UNDERSTANDING AND USING STATISTICS:BASIC CONCEPTS SECOND EDITION
MARTY J.SCHMIDT1979 年出版498 页ISBN：0669022705
UNDERSTANDING INTERMEDIATE ALGEBRA:A TEXT/WORKBOOK SECOND EDITION
LEWIS HIRSCH ARTHUR GOODMAN1991 年出版967 页ISBN：0314812989
STUDY GUIDE FOR UNDERSTANDING SOCIAL PROBLEMS SECOND EDITION
LINDA MOONEY DAVID KNOX CAROLINE SCHACHT2000 年出版236 页ISBN：0534565123
UNDERSTANDING SALES AND LEASES OF GOODS SECOND EDITION
WILLIAN H.HENNING AND WILLIAM H.LAWRENCE2009 年出版410 页ISBN：1422422496
UNDERSTANDING AND CREATING ART BOOK ONE Second Edition
Ernest Goldstein Theodore H.Katz Jo D.Kowalchuk2222 年出版321 页ISBN：0314765433
READING FASTER AND UNDERSTANDING MORE BOOK 1 SECOND EDITION
WANDA MAUREEN MILLER SHARON STEEBER1985 年出版375 页ISBN：
UNDERSTANDING AND USING ENGLISH GRAMMAR VOLUME B SECOND EDITION
1989 年出版204 页ISBN：0139436146
UNDERSTANDING AND CREATING ART SECOND EDITION BOOK TWO
ERNEST GOLDSTEIN THEODORE H.KATZ JO D.KOWALCHUK ROBERT J.SAUNDERS1992 年出版393 页ISBN：0314765468
UNDERSTANDING AND USING ENGLISH GRAMMAR Second Edition WORKBOOK Volume B
2222 年出版300 页ISBN：0139440003
LEGAL METHODS:UNDERSTANDING AND USING CASES AND STATUTES SECOND EDITION
PETER L.STRAUSS2008 年出版889 页ISBN：1599413914
