00595nam a22001811 4500 1/20528 031209s1981 enk 0 1 eng d 0669036935 21120 DLC GR-PeUP 363.7 SI Siebert, Horst, 1938- Economics of the environment / Horst Siebert Lexington : Lexington Books , 1981 xii, 230 p. : ill. ; 24cm. Include bibliography and index Environmental policy Mathematical models. INST UNIPILB MAIN 20040709 363.7 SI 00142142 00142142 LOAN 0 1