00508nam a2200169Ia 4500082001900000100002700019245007000046260005200116300001300168500000500181690000600186700000500192952010000197964001700297921000900314999001500323  a333.95bK94.NE  aKrutilla, J. V. d ed.  aNatural environmentsbstudies in theoretical and applied analysis  aBaltimorebJohns Hopkins University Pressc1972  ax, 352p.  a  a   a  00104070aISIbISId1998-08-27l0o333.95 K94.NEpDP7786r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a6762  c6762d6762