GUPTA A P. (1987). BUSINESS STATISTICS (6.). SULTAN CHAND AND SONS.
Dyfyniad Arddull ChicagoGUPTA A P. BUSINESS STATISTICS. 6. NEW DELHI: SULTAN CHAND AND SONS, 1987.
Dyfyniad MLAGUPTA A P. BUSINESS STATISTICS. 6. SULTAN CHAND AND SONS, 1987.
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