00420nam a22001337a 4500008004100000040005500041080002000096245005200116260004200168300001500210650001500225653001900240700002700259230601b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a620.91(042)bL7  aEconomics of natural & environmental resources   aNew York: bGordon and Breach, c1977  axi, 502p.   aEconomics   aEnvironmental   aSmith, Vernon L (Ed.)