Extension research and marketing handbook :
guide to the development and conduct of extension marketing educational work under the research and marketing act.

APA Citation

United States. Extension Service. (1949). Extension research and marketing handbook: guide to the development and conduct of extension marketing educational work under the research and marketing act. Rev. Washington.

MLA Citation

United States. Extension Service. Extension Research And Marketing Handbook: Guide to the Development And Conduct of Extension Marketing Educational Work Under the Research And Marketing Act. Rev. Washington, 1949.