00457nam a2200169Ia 4500082002000000100002200020245004000042260003100082300001600113500000500129690000600134700000500140952010100145964001700246921000900263999001500272  a333.7bSm648.CN  aSmith, G. H., ed.  aConservation of natural resourcesb  aNew YorkbJohn Wileyc1971  axiii, 685p.  a  a   a  00104070aISIbISId1998-08-25l0o333.7 Sm648.CNpDP5753r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a6006  c6006d6006