Powell, Ronald R.
Basic research methods for librarians
Greenwich Ablex Publishing Corporation , 1999
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Lorie, James H.
Basic methods of marketing research
NMcGraw-Hill , 1951
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Simpson, I.S.
Basic statistics for librarians
Library Association, 1988
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Simon, Julian L.
Basic research methods in social sciences : the art of emperical investigation
Random House, 1978
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McNeill, Patrick
Research methods
Routledge, 1990
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