des Brunner, E., & Yang, H. P. (1949). Rural america and the extension service: A history and critique of the co-operative agricultural and home economics extension service. Columbia university.
Παραπομπή Chicago Styledes Brunner, Edward, και Hsin Pao Yang. Rural America and the Extension Service: A History and Critique of the Co-operative Agricultural and Home Economics Extension Service. U S A: Columbia university, 1949.
Παραπομπή MLAdes Brunner, Edward, και Hsin Pao Yang. Rural America and the Extension Service: A History and Critique of the Co-operative Agricultural and Home Economics Extension Service. Columbia university, 1949.
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