Changes in technology and labor requirements in livestock productionGeorge A. Sallee, Arthur Armington Lewis, Robert B. Elwood, William Anton Newman, Robert Bailey Elwood, United States. Bureau of Agricultural Economics, United States. Work Projects Administration, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.) · First published 1941Open the Tome
The mammogenic hormones of the anterior pituitaryArthur Armington Lewis · First published 1939Open the Tome
