Agricultural commodities index: Ready-reference index to U.S.D.A. statistical series: Phoenix: Oryx Press, Phoenix, Arizona. c!978 Jane Busby McFall (editor), p. 1955 ISBN 0-912700-09Z $95

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论文评审过程:Available online 17 July 2002.

论文官网地址:https://doi.org/10.1016/0306-4573(79)90037-2