Armitage, P.
Statistical methods in medical research
Blackwell Scientific Publication, 1985
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Fisher, Ronald A.
Statistical methods for research workers
Hafner Press, 1970
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Adler, Max K.
Lectures in market research
Crosby Lockwood & Sons, 1965
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Readings in market research
edited by Keith K. Cox
Appleton-Century-Crofts, 1967
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Peterson, Robert A.
Marketing research /​ Robert A. Peterson
Business Publications , 1982
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