共 40 条
[31]
Study of Critical Environmental Problems, 1970, MANS IMPACT GLOBAL E
[32]
WATTENBERG B, 1970, NEW REPUBLIC, V162, P18
[34]
1969, MODEL SOCIETY PROGRE
[35]
[No title captured]
[36]
1970, NEW YORK TIMES, P18
[37]
1968, FAO PRODUCTION YEARB
[38]
1968, FAO TRADE YEARBOOK
[39]
1969, CLEANING OUR ENVIRON, P95
[40]
1970, NEWSWEEK, V76, P50