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Swidden cultivation in Asia.

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Peasants in the hills a study of the dynamics of social change among the Buhid swidden cultivators in the Philippines by Gonzaga, Violeta B. Lopez

Peasants in the hills a study of the dynamics of social change among the Buhid Swidden cultivators in the Philippines by Gonzaga-Lopez, Violeta

Physiological determinants of crop growth by Charles-Edwards, D.A. 1944-

Uprooting the kaingin problem issues, snags and strategies.