(1981). Evaluation of agricultural research: Proceedings of a symposium sponsored by NC-148 (analysis of returns to agricultural and related research in the North Central Region), Minneapolis, May 12-13, 1980.
Dyfyniad Arddull ChicagoEvaluation of Agricultural Research: Proceedings of a Symposium Sponsored by NC-148 (analysis of Returns to Agricultural and Related Research in the North Central Region), Minneapolis, May 12-13, 1980. 1981.
Dyfyniad MLAEvaluation of Agricultural Research: Proceedings of a Symposium Sponsored by NC-148 (analysis of Returns to Agricultural and Related Research in the North Central Region), Minneapolis, May 12-13, 1980. 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.