"Ensminger, Douglas." . . . . "ENSMINGER, D. (Ed.)." . . "Agricultural extension work." . . "Agriculture." . . "Sanders, I.T." . . "Sanders, I. T." . "Enseignement agricole." . . "Sanders, Irwin T." . . . "Farmers of the world : The development of agricultural extension : Brunner , Irwin T. Sanders , Douglas Ensminger" . . . . "Farmers of the world : The development of agricultural extension" . . . . . . . "Farmers of the world; the development of agricultural extension"@en . "Farmers of the world; the development of agricultural extension" . . "Farmers of the world the development of agricultural extension"@en . "Farmers of the world the development of agricultural extension" . . . . . . . . . . . . . . . . "Farmers of the World. The development of agricultural extension. [By various authors.] Edited by E. de S. Brunner, Irwin T. Sanders, and Douglas Ensminger"@en . . "Farmers of the world : the development of agricultural extension : [a symposium]" . . . . . . . . . . . . . "Farmers of the world : the development of agricultural extension"@en . . "Farmers of the world : the development of agricultural extension" . . . . . . . "Farmers of the world : the development of agricultural extension /Ed. by Edmund de S. Brunner ; Irwin T. Sanders ; Douglas Ensminger" . . . . . .