Suquilanda V., Manuel B. Serie Agricultura Organica/ Manuel B. Suquilanda V. - 3 - Ecuador : Abya - Yala - 654 p ISBN: 9978-04-126-5 Subjects--Topical Terms: 1. AGRICULTURA ORGANICA 2. TECNOLOGIA AGRICOLA 3. MANEJO ECOLOGICO Universal Decimal Class. No.: 631 S9599