00269nam a2200097   450000100070000000500170000700800360002410000550006024500240011526400320013900816420260807101518.0260101s1976    pe      000 0 eng  d1 aPaul R. Ehrlich ; Richard W. Holm ; Irene L. Brown10aBiology and society 1aNew YorkbMcGraw Hillc1976