Jones, B. E., & Helland, R. O. (1948). Index to river surveys made by the United States Geological Survey and other agencies: Revised to July 1, 1947. United States Government Printing Office.
Chicago-Zitierstil (17. Ausg.)Jones, Benjamin E., und Randolph O. Helland. Index to River Surveys Made by the United States Geological Survey and Other Agencies: Revised to July 1, 1947. Washington: United States Government Printing Office, 1948.
MLA-Zitierstil (9. Ausg.)Jones, Benjamin E., und Randolph O. Helland. Index to River Surveys Made by the United States Geological Survey and Other Agencies: Revised to July 1, 1947. United States Government Printing Office, 1948.
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