Leonard, D. Soils, crops and Fertiliser Use: A field Manual for development workers/ By David Leonard.- - 4th - United State: Peace Corp, 1986 - x,338p.: ill.: 27cm include bibliographical references and index Source: B-13824 Subjects--Topical Terms: Soil--AgricultureCrops and Fertiliser LC Class. No.: S596.7 / .L46 1986