UNDERSTANDING AMERICAN GOVERNMENT EIGHTH EDITION
SUSAN WELCH JOHN GRUHL JOHN COMER SUSAN M.RIGDON著2222 年出版621 页ISBN：0534647499
UNDERSTANDING SOCIETY AN INTRODUCTORY READER
MARGARET L.ANDERSEN KIM A.LOGIO HOWARD F.TAYLOR著2222 年出版576 页ISBN：0534566669
understanding your health seventh edition
WAYNE A.PAYNE，Ed.D. DALE B.HAHN，Ph.D.2222 年出版772 页ISBN：0072353236
Understanding Product Design for Injection Molding
1996 年出版116 页ISBN：1569902100
UNDERSTANDING AND MANAGING INVESTMENT RLSK & RETURN
1990 年出版215 页ISBN：1557381054
