Gbetibouo, Mathurin Cocoa product price relationships / Mathurin Gbetibouo & Kirti Mehta - Washington, DC : World Bank (WB) , 1988 - v, 87p. : ill. ; 28 cm. - Working paper (World Bank. International Commodity Markets Division), no. 1988-1 . Includes bibliographical references. Subjects--Topical Terms: Cocoa--Prices --Mathematical models Gov. Doc. Class. No.: UN WB IED ICMD DWP-1988-1