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The training and function of the Dutch graduate agriculturist
Vervelde, G. J., (1955)
Agricultural education at university level
(1965)
Proceedings of a Symposium for Teachers of Agricultural Economics : Virginia Polytechnic Institute ; august 17-20, 1966
Hess, Carroll V., (1967)
Inhoud en structur der sociale agronomie
Timmer, W. J., (1951)