The Soil : How the Soil Is Made Up (Better Farming Series; 4-6)

Initially published by arrangement with INADES, Institut africain pour le developpement economique et social, Abidjan, Cote d'Ivoire, the Better Farming Series booklets are designed as handbooks for intermediate-level agricultural education and training courses.

They may be purchased as a set (45 booklets) or singly."