1992 - Crop Ecology Productivity and Management in Agricultural Systems (Hardcover) → Paperback ISBN-13: 9780521383790 ISBN-10: 052138379X Genre: Science & Math ? 1992 - Crop Ecology Productivity and Management in Agricultural Systems (Paperback) → Hardcover ISBN-13: 9780521387767 ISBN-10: 0521387760 Genres: Science & Math, Engineering & Transportation ? |