Agricultural advisory services in Europe and North America, 1957 ; report of the international working conference of directors and senior officers of agricultural advisory services in member and associate countries held at O. E. E. C. headquarters, Paris,in June 1957. Project no. 395/A.
Agricultural advisory services in Europe and North America, 1957 ; report of the international working conference of directors and senior officers of agricultural advisory services in member and associate countries held at O. E. E. C. headquarters, Paris,in June 1957. Project no. 395/A.