Arora, H.C. 1966. Rotifer as indicators of trophic nature of environments. J. Hydrobiologia., 27(1–2): 146–159.

Aslam, M., Verma, D.K., Dhakerya, R., Rais, S., Alam, M. and Ansari, F.A. 2012. Bioindicator: a comparative study on uptake and accumulation of heavy metals in some plants leaves of M.G. Road, Agra City, India. Res. J. Environ. Earth Sci., 4(12): 1060–1070.

Batiuk, R.A., Orth, R.J., Moore, K.A., Dennison, W.C., Stevenson, J.C., Staver, L.W. and Carter, V. et al. 1992. Chesapeake Bay submerged aquatic vegetation habitat requirements and restoration targets: a technical synthesis. Annapolis (MD): Chesapeake Bay Program, 83/92: 166–169.

Fritts, H.C. 1976. Tree Rings and Climate. Academic Press, New York.

Grill, D., Lieg, I.E. and Windisch, E., 1979. Holzanatomische Untersuchungen an abgasbelasteten B~iumen. Phytopathologische Zeitschrift, 94: 335-342.

Grizzle, R.E. 1984. Pollution indicator species of macro benthos in a coastal lagoon. Mar. Ecol. Prog. Ser., 18: 191–200.

Hans, W., Dyble, P.J., Moisander, P.H., Noble, R.T., Piehler, M.F., Pinckney, J.L., Steppe, T.F., Twomey, L. and Valdes, L.M. 2003. Microbial indicators of aquatic ecosystem change: current applications to eutrophication studies. FEMS Microbiol Ecol., 46: 233–246.

Holt, E.A. and Miller, S.W. 2010. Bioindicators: using organisms to measure environmental impacts. Nature, 3(10): 8–13.

Hosmani, S.P. 2013. Freshwater algae as indicators of water quality. Univers. J. Environ. Res. Technol., 3(4): 473–482.

Jain, A., Singh, B.N., Singh, S.P., Singh, H.B. and Singh, S. 2010. Exploring biodiversity as bioindicators for water pollution. National Conference on Biodiversity, Development and Poverty Alleviation; 2010 May 22, Uttar Pradesh. Lucknow (India): Uttar Pradesh State Biodiversity Board.

Joanna, B. 2006. Bioindicators: types, development, and use in ecological assessment and research. Environ. Bioind., 1: 22–39.

Khan, H.M. and Khan, M.A.Q. 1974. Biological magnification of photodieldrin by food chain organisms. Arch. Environ. Contam. Toxicol., 2: 289-301.

Khatri, N. and Tyagi, S. 2015. Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas. Front Life Sci., 8(1): 23–39.

Klemm, D.J. 1990. Macro invertebrate field and laboratory methods for evaluating the biological integrity of surface waters. Cincinnati (OH): EPA.

Lambert, S.J. and Davy, A.J. 2011. Water quality as a threat to aquatic plants: discriminating between the effects of nitrate, phosphate, boron and heavy metals on charophytes. New Phytologist., 189: 1051-1059.

Lerman, Si., Darley, E.F., 1975. Particulates. In: Mudd, J.B., Kozlowski, T.T., 1975. Responses of Plants to Air Pollutants. Academic Press, New York, pp. 141-158.

Lux, H. 1965. Ergebnisse von Zuwachsuntersuchungen (Bohrspahnanalyse) im Rauchschadengebiet Diibener Heide. Archiv fiir Forstwesen., 14: 433-442.

Markert, B.A., Breure, A.M. and Zechmeister, H.G. 2003. Chapter 1, definitions, strategies and principles for bioindication/ biomonitoring of the environment. In: Trace Metals Other Contam Environ., 6: 3–39.

Marques, J.C. 2001. Diversity, biodiversity, conservation, and sustainability. Sci. World. J., 1: 534–543.

Nair, G.G. 1961. Floral study of the sterile Crotalaria striata L. observed in the radioactive monazite sand. Transaction of the Bose Research Institute, 24: 67-72.

Osborn, W.S. 1961. Variation in clones of Penstemon growing in natural areas of differing radioactivity. Science, 134: 342-343.

Peterson, W.T. 1986. The effects of seasonal variations in stratification on plankton dynamics in Long Island Sound. In: Bowman MJ, Yentsch CM, Peterson WT, editors. Tidal mixing and plankton dynamics. Berlin: Springer-Verlag. Vol. 17. Lecture Notes in Coastal and Estuarine Studies, pp. 225–319.

Rakshit, A., Abhilash, P.C., Singh, H.B. and Ghosh, S. 2017. Adaptive soil management: From theory to practices. Springer Nature, ISBN 978-981-10-3637-8, pp. 571.

Ramchandra, T.V., Rishiram, R. and Karthik, B. 2006. Zooplanktons as bioindicators: hydro biological investigation in selected Bangalore lakes. Technical Report, 115.

Salonen, M., Uroh, L. and Engstrom-ost, J. 2009. Effects of turbidity and zooplankton availability on the condition and prey selection of pike larvae. Boreal Environment Research, 14: 981-989.

Schroder, P. 1998. Halogenated air pollutants. In: De Kok, L.J., Stulen, I. (Eds), Responses of Plant Metabolism to Air Pollution and Global Change. Backhuys, Leiden, pp. 131-145.

Utriainen, J. and Holopainen, T. 1998. Effects of elevated CO2 and O3 concentrations on dry matter partitioning, chlorophyll content and needle ultrastructure of Scots pine seedlings. In: De Kok, L.J., Stulen, I. (Eds), Responses of Plant Metabolism to Air Pollution and Global Change. Backhuys, Leiden, pp. 467-469.

Uttah, E.C., Uttah, C., Akpan, P.A., Ikpeme, E.M., Ogbeche, J. and Usip, J.O. 2008. Bio-survey of plankton as indicators of water quality for recreational activities in Calabar River, Nigeria. J Appl. Sci. Environ Manage., 12(2): 35–42.

Walsh, G.E. 1978. Toxic effects of pollutants on plankton. In: Butler GC, editor. Principles of ecotoxicology. New York (NY): Wiley. Chapter 12; p. 257–274.