Business research methods 
Emory, C. William. 
 - revised edition. 
 -  Richard D. Irwin, Inc.  1980 
 - xiv, 530 pages. 
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<br/><br/><label>ISBN: </label>9-71080334-4 
<br/><br/><label>Dewey Class. No.: </label>658.001 F43b 1980