Smithsonian Institution. (1945). On the 27.0074-day cycle in Washington precipitation. [s.n.].
Chicago Style (17th ed.) CitationSmithsonian Institution. On the 27.0074-day Cycle in Washington Precipitation. [Washington]: [s.n.], 1945.
MLA (9th ed.) CitationSmithsonian Institution. On the 27.0074-day Cycle in Washington Precipitation. [s.n.], 1945.
Warning: These citations may not always be 100% accurate.