S, Musa, Umar A., and Wudil H. “RELATIONSHIP BETWEEN GROSS MARGIN AND SOME SOCIO-ECONOMIC VARIABLES IN SOME SELECTED DATE PALM MARKETS OF JIGAWA STATE NIGERIA”. Journal of Marketing and HR 6 (November 7, 2017): 344-355. Accessed May 2, 2024. http://scitecresearch.com/journals/index.php/jmhr/article/view/1264.