UNDERSTANDING ALGEBRA REVISED EDITION
JOHN BALEY MARTIN HOLSTEGE1991 年出版634 页ISBN：0070035660
UNDERSTANDING EARTH THIRD EDITION
FRANK PRESS AND RAYMOND SIEVER2001 年出版573 页ISBN：
UNDERSTANDING PSYCHOLOGY SIXTH EDITION
CHARLES G.MORRIS AND ALBERT A.MAISTO2003 年出版750 页ISBN：
UNDERSTANDING BUSINESS FOURTB EDITION
WILLIAM G.NICKELS JAMES M.MCHUGH SUSAN M.MCHUGH1997 年出版750 页ISBN：
UNDERSTANDING PSYCHOLOGY SEVENTH EDITION
ROBERT S.FELDMAN BARBARA L.RADIGAN SHERYL M.HARTMAN2005 年出版485 页ISBN：0072954604
