Qualitative Research Methods For The Social Sciences Sixth Edition
Bruce L.Berg2007 年出版0 页ISBN：
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LAWRENCE A.ERVIN2222 年出版563 页ISBN：
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HOBART H.WILLARD LYNNEL.MERRITT2222 年出版1030 页ISBN：
Mathematical methods for physicists (sixth edition)
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ELEMENTARY STATISTICS IN SOCIAL RESEARCH SIXTH EDITION
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THE PRACTICE OF SOCIAL RESEARCH SIXTH EDITION
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