ECONOMICS：PRINCIPLES AND POLICY EIGHTH EDITION
WILLIAM J.BAUMOL AND ALAN S.BLINDER2000 年出版524 页ISBN：0030268478
Agricultural economics and agribusiness sixth edition
Gail L.Cramer and Glarence W.jensen1994 年出版534 页ISBN：0471595527
ECONOMICS OF SOCIAL ISSUES THIRTEENTH EDITION
ANSEL M.SHARP CHARLES A.REGISTER PAUL W.GRIMES2222 年出版0 页ISBN：
ECONOMICS OF SOCIAL ISSUES NINTH EDITION
ANSEL M.SHARP CHARLES A.REGISTER RICHARD H.LEFTWICH1990 年出版431 页ISBN：
ENVIRONMENTAL AND NATURAL RESOURCE ECONOMICS SEVENTH EDITION
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ENVIRONENTAL AND NATURAL RESOURCE ECONOMICS SCEOND EDITION
2222 年出版559 页ISBN：0673189457
ENVIRONMENTAL AND NATURAL RESOURCE ECONOMICS FIFTH EDITION
2000 年出版630 页ISBN：0321031288
