Agricultural extension in the developing countries
Vries, C.A. de
Agricultural extension in the developing countries Bibliography - Wageningen 1968 - 1-125 p. - Agriculture Netherlands International Institute for Land Reclamation and Improvement. Bibliography Publication No. 9 .
Agricultural extension in the developing countries Bibliography - Wageningen 1968 - 1-125 p. - Agriculture Netherlands International Institute for Land Reclamation and Improvement. Bibliography Publication No. 9 .