United States. Agricultural Research Service. Northern Regional Research Center. (1990). 50 years, 1940-1990: Northern Regional Research Center. Agricultural Research Service.
Chicago Style (17th ed.) CitationUnited States. Agricultural Research Service. Northern Regional Research Center. 50 Years, 1940-1990: Northern Regional Research Center. Peoria, IL: Agricultural Research Service, 1990.
MLA (9th ed.) CitationUnited States. Agricultural Research Service. Northern Regional Research Center. 50 Years, 1940-1990: Northern Regional Research Center. Agricultural Research Service, 1990.
Warning: These citations may not always be 100% accurate.