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The biology of agricultural systems by Spedding, C. R. W.

Farming systems of the world by Duckham, Alec Narraway

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An Empirical analysis of household labor supply in Philippine rice economies by Lanzona, Leonardo A.

Contract farming and the broader need for stronger vertical coordination of agricultural marketing systems in developing countries by Mittendorf, M.J

Farming systems development the Philippine experience. by Serrano, Segundo C.

Land utilization in Northeastern Laguna an analysis of farming systems by Occena, Darlene J.

Analysis and evaluation of agroforestry as an alternative environmental design in the Philippines by Tabora, Panfilo C.

A profitability study of farming systems in Pangasinan and Camarines Sur. -- 1985. by Weesit, Ma. Regina D.