000 00315nam a2200133Ia 4500
008 160316s1972 xxu||||| |||| 00| 0 eng d
020 _a
100 _aEthrenfield,David W.
245 _aConserving Life On Earth
250 _a
260 _aNEW YORK
_bOXFORD UNIVERSITY PRESS
_c1972
300 _a341
700 _a
_a
999 _c19853
_d19853