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3081
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3082
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3083
Distribution of the forms of nitrogen in some Philippine soils [microform]
יצא לאור 1977Visual Material -
3084
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3085
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3086
Hydrolysis of urea and performance of some slow release urea fertilizers in flooded rice [microform]
יצא לאור 1977Visual Material -
3087
Effect of PH on the growth of rhizobia and nitrogen fixation in some rhizobium-legume associations [microform]
יצא לאור 1977Visual Material -
3088
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3089
A study on the application of linear programming for sawmill improvement [microform]
יצא לאור 1977Visual Material -
3090