1. Asri, Y. (1999). Ecological evaluation of plant communities in arid regions, case study (Touran biosphere reserve), Ph.D. Thesis. Islamic Azad University, pp: 302.
2. Babu, C.R. (1977). Herbaceous Flora of Dehra Dun, C.S.I.R. New Delhi.
3. Baruah, P.P. (2003). Biological spectrum of the flora of sand bars (Chapories) of Brahmaputra River. Indian J. Forestry, 26(2): 172-176.
4. Bharucha, F.R. and Dave, R.N. (1944). The biological spectrum of grassland association. J. Univ. Bombay, 13: 15-16.
5. Dadhich, L.K. (1982). The biological spectrum of flora of Jhamarkotra. Acta. Ecol., 4: 17-20. https://doi.org/10.1080/0028825X.1982.10426402
6. Dansereau, P. (1957). Biogeography: An Ecological Perspective. Ronand Press, New York
7. Dayama, O.P. (1987). Flora and biological spectrum of Bichoon area, District Jaipur, Rajasthan. Indian J. For., 10(4): 248-252.
8. Duthie, J. F. (1903-1929). Flora of the Upper Gangetic Plain and of the Adjacent Siwaliks and Sub-Himalayan Tracts. Vols. 1-3 Rep. 1994. Bishen Singh Mahendra Pal Singh, Dehra Dun. https://doi.org/10.5962/bhl.title.10981
9. Ellenberg, H. and D. Mueller-Dombois. (1967). A key to Raunkiaer plant life forms with revised sub-divisions. Ber., Geobot. Inst. E.T.H., Stiftg. Rubel, Zurich, 37:56-73.
10. Ghildiyal, J.C. and Srivastava, M.M. (1990). Life-forms and biological spectrum of a tropical fresh-water swamp forest at Rishikesh (Dehra Dun). Indian Journal of forestry 13 (2):132-148
11. Gupta, V.C. and Kachroo, P. (1983). Life-form classification and biological spectrum of the flora of Yusmarg, Kashmir. Trop. Ecology, 24(1): 22-28.
12. Hamzeh, B. (1995). Plant communities of Gheshm Island and their relation to ecological factors and providing vegetation map. Ms. Thesis, Tehran University, pp: 372.
13. Kanjilal, U.N. (1928). Forest Flora of the Chakrata, Dehra Dun and Saharanpur Forest Division, Rep. 1994. Bishen Singh Mahendra Pal Singh.
14. Lakshmanan, N.K. (1962). The application of Raunkiaer’s life-forms. J. Ind. Bot. Soc., 41(4): 585-589.
15. Lindsey, A.A., Petty, R.O., Sterling, D.K. and Asdall, W.V. (1961). Vegetation and environment along the Wabash and Tippecanoe, Rivers. Ecological Monograph, 31: 105-156. https://doi.org/10.2307/1950752
16. Malekmohammadi, L., Mahmoudzadeh, A. and Hassanzadeh, A. (2007). Floristic study of Ghasemloo (Shohada) Valley Forest Reserve and adjacent area. Pak. J. of Biol. Sci., 10(10): 1618-1624. https://doi.org/10.3923/pjbs.2007.1618.1624
17. Meher-Homji, V.M. (1981). Environmental implications of life-form spectra from India. J. Econ. Taxon. Bot., 2:23-30.
18. Mueller-Dombois, D. and Ellenberge, E. (1974). Aims and Methods of Vegetation Ecology. John Wiley & Sons, New York.
19. Naiman, R.J. and Decamps, H. (eds) (1990). The Ecology and Management of Aquatic-Terrestrial Ecotones. United Nations Educational, Scientific and Cultural Organization, Paris
20. Nilsson, C., Jansson, R. and Zinko, U. (1997). Long-term response of river-margin vegetation to water-level regulation. Science, 276: 798-800. https://doi.org/10.1126/science.276.5313.798
21. Pandeya, S.C. (1953). Grassland of Sagar, Madhya Pradesh. Indian Forester, 78:636-654
22. Raizada, M.B. (1969). The Dehradun Herbarium: its origin, history and mission. J. Sen. Memor. Vol., Bot. Soc. Bengal, 487-498.
23. Rajwar, G. S. and Gupta, S.K. (1984). Biological spectrum of Garhwal Siwalik. Indian Forester, 110(12): 1171-1176.
24. Rajwar, G.S. and Gupta, S.K. (1981). Structure of forest vegetation of Garhwal Siwalik hills between the rivers Khoh and Ganges. Indian Forester, 118 (2): 148-165.
25. Rao, C.C. (1968). Biological Spectrum of Karamnasa watershed flora (Varanasi, India). Proc. Symposium on Recent Advances in Tropical Ecology, Part-II (R. Misra and B. Gopal, eds.), Banaras Hindu University, Varanasi.
26. Raunkiaer, C. (1934). The Life-forms of Plants and Statistical Plant Geography. The Clarendon Press, Oxford. pp. 632.
27. Saxena, A.K. (1980). Ecology of vegetation complex of North-Western Catchment of River Gola. P.14. Progress Report, Eco. Res. Circle, Deptt. of Botany, Kumaon University, Nainital.
28. Uniyal, B.P. and Rao, R.R. (1993). Vegetation and Flora of Rajaji Sanctuary in Uttar Pradesh, India. Jour. Econ. Tax. Bot. 17(1): 1-13.