00367nam a22001217a 4500007000400000008000400004020001500008040000900023050001700032245013300049260004400182300001900226000000  a9280710427  aUOEL  aHC79 .E5bE2  aThe Economics of Survival :bThe role of cost - benefit analysis in environmental decision - making /cedited by Yusuf J. Ahmed.  aNairobi ;bPrudential printers,cc1981.  axxiii, 78 p. :