United States. Department of Health, Education, and Welfare. (1930). Study of pollution and natural purification of Illinois River: II. Plankton and related organisms. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Health, Education, and Welfare. Study of Pollution and Natural Purification of Illinois River: II. Plankton and Related Organisms. [Washington]: GPO, 1930.
MLA (9th ed.) CitationUnited States. Department of Health, Education, and Welfare. Study of Pollution and Natural Purification of Illinois River: II. Plankton and Related Organisms. GPO, 1930.
Warning: These citations may not always be 100% accurate.