The separation of the Farm Bureau and the Extension Service : political issue in a Federal system / William J. Block Block, William J. (William Joseph), 1918- American Farm Bureau Federation. United States. Federal Extension Service. Agricultural extension work. H31 .I4 vol. 47 HD1485.A45 B5 351 BLS Published in 1956 in microfilm form as thesis, University of Illinois. Bibliography: p. 278-288. Urbana : University of Illinois Press, 1960. 1960. 1960 Text vii, 304 p. eng Illinois studies in the social sciences ; v. 47