000 00320nam a2200133Ia 4500
008 160316s1977 xxu||||| |||| 00| 0 eng d
020 _a
100 _aYadava, P S Ed.
245 _aProgess In Ecology
250 _a
260 _aNew Delhi
_bToday & Tommorows Printers and Publishers
_c1977
300 _a
700 _a
_a
999 _c17945
_d17945