Philippines, & Bureau of agricultural research. (1990). On-farm research manual: Feedback mechanism. Quezon city, Philippines: Bureau of agricultural research.
Chicago Stili AlıntıPhilippines, ve Bureau of agricultural research. On-farm Research Manual: Feedback Mechanism. Quezon city, Philippines: Bureau of agricultural research, 1990.
MLA AlıntıPhilippines, ve Bureau of agricultural research. On-farm Research Manual: Feedback Mechanism. Quezon city, Philippines: Bureau of agricultural research, 1990.
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