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            31Nitrogen-potassium ratios in relation to nutrient content and yield of cotton [microform].Published 1980Visual Material
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            32The role of communication on the knowledge and attitude of Mt. Makiling kaingineros towards resettlement [microform].Published 1980Visual Material
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            33Content analysis of criterion-referenced tests used in the Division of Isabela [microform].Published 1980Visual Material
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            34Food and feeding habits of the house bat, Scotophilus Temminckii (Horsfield), Chiroptera Vespertilionidae [microform].Published 1980Visual Material
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            35Yield response curve of sugarcane under varying levels of nitrogen fertilization and water regimes [microform].Published 1980Visual Material
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            36The translatability from English to Pilipino of terms used in rice production an exploratory study [microform].Published 1980Visual Material
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            37
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            38
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            39Biological constraints to high yields in selected farmers' fields in Iloilo, Philippines [microform].Published 1980Visual Material
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            40