TY - BOOK AU - Tiwari, S. C. TI - Concepts of modern ecology SN - 8121100887 U1 - 574.5 PY - 1992/// CY - Dehra Dun PB - Bishen Singh Mahendra Pal Singh KW - Ecology KW - Environment KW - Pollution KW - Ecosystem KW - Biogeography KW - Remote Sensing KW -