Markating research : Measurement and methods. 6 Ed - Donald S. Tull; Del I. Hawkins (New Delhi Printice Hall Of India Pvt Limited, 1993)
Donald S. Tull & Del I. Hawkins: Markating research : Measurement and methods. 6 Ed. (6th Ed) New Delhi. Printice Hall Of India Pvt Limited, 1993. 81-203-0961-8--(658.8TUL)
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