Παραπομπή APA

Martin, W. J., & Heady, E. O. (1984). A quarterly model of the U.S. livestock-feed subsector and some of its dynamic multipliers. Ames: Center for Agricultural and Rural Development. Iowa State University.

Παραπομπή Chicago Style

Martin, W. J., and Earl O. Heady. A Quarterly Model of the U.S. Livestock-feed Subsector and Some of Its Dynamic Multipliers. Ames: Center for Agricultural and Rural Development. Iowa State University, 1984.

Παραπομπή MLA

Martin, W. J., and Earl O. Heady. A Quarterly Model of the U.S. Livestock-feed Subsector and Some of Its Dynamic Multipliers. Ames: Center for Agricultural and Rural Development. Iowa State University, 1984.

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