AMERICAN GOVERNMENT AND POLITICS TODAY:THE ESSENTIALS THIRD EDITION
BARBARA A.BARDES MACK C.SHELLEY1980 年出版569 页ISBN：0314665692
AMERICAN GOVERNMENT AND POLITICS TODAY:THE ESSENTIALS 1998-1999 EDITION
BARBARA A.BARDES MACK C.SHELLEY STEFFEN W.SCHMIDT1998 年出版621 页ISBN：0534539017
PRINCIPLES OF PHYSICAL GEOGRAPHY:AN INTRODUCTION TO NATURAL PHENOMENA
TED J.ALSOP1993 年出版371 页ISBN：0787205583
ESSENTIALS OF PHYSICAL ANTHOPOLOGY FOURTH EDITON
ROBERT JURMAIN2001 年出版443 页ISBN：0534578160
INTRODUCTORY ECONOMIC GEOGRAPHY SECOND EDITION
LESTER E. KLIMM AND OTIS P. STARKEY1940 年出版501 页ISBN：
