UNDERSTANDING THE NEW POLITICS OF ABORTION
MALCOLM L.GOGGIN1993 年出版323 页ISBN：0803952406
UNDERSTANDING DOGMAS AND DREAMS A TEXT
NANCY S.LOVE1998 年出版216 页ISBN：1566430449
UNDERSTANDING CHEMISTRY:from atoms to attitudes
T.R.Dickson1974 年出版302 页ISBN：0471212857
UNDERSTANDING AND USING COMMUNICATION IN BUSINESS
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UNDERSTANDING AMERICAN POLITICAL PARTIES DEMOCRATIC IDEALS
POLITICAL UNCERTAINTY AND STRATEGIC POSITIONING2013 年出版135 页ISBN：0415508436
UNDERSTANDING RESEARCH IN THE SOCIAL SCIENCES
CURTIS HARDYCK AND LEWIS F.PETRINOVICH1975 年出版224 页ISBN：
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CHARLES HENRY BRASE CORRINNE PELLILLO BRASE1995 年出版576 页ISBN：0669398128
