Symposium of American Society of Agronomy Chicago, I., American Society of Agronomy. Divisions A-4, American Society of Agronomy. Divisions A-6, & Usherwood, N. R. (1981). Transferring technology for small-scale farming: Proceedings of a symposium. Volume 41. Madison, Wisconsin: American Society of Agronomy.
Citación estilo ChicagoSymposium of American Society of Agronomy Chicago, Illinois), American Society of Agronomy. Divisions A-4, American Society of Agronomy. Divisions A-6, y Noble R. Usherwood. Transferring Technology for Small-scale Farming: Proceedings of a Symposium. Volume 41. Madison, Wisconsin: American Society of Agronomy, 1981.
Cita MLASymposium of American Society of Agronomy Chicago, Illinois), American Society of Agronomy. Divisions A-4, American Society of Agronomy. Divisions A-6, y Noble R. Usherwood. Transferring Technology for Small-scale Farming: Proceedings of a Symposium. Volume 41. Madison, Wisconsin: American Society of Agronomy, 1981.