United States. Office of Experiment Stations. Experiment Station Record, Volume 39, July-December, 1918. Washington D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc5015/. Accessed December 21, 2013.
Note: Inconsistencies in capitalization and punctuation within the Digital Library may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.