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- Geological Survey (U.S.)266
- ebrary, Inc33
- Project Muse16
- Grinnell, Joseph, 1877-193914
- Merriam, John C. (John Campbell), 1869-194511
- Arnold, Ralph, 1875-196110
- California. State Dept. of Education9
- Geological Survey (U.S.), issuing body9
- International Geological Congress (28th : 1989 : Washington, D.C.)9
- Muir, John, 1838-19149
- Brown, Vinson, 1912-19918
- Geological Survey of California8
- Jepson, Willis Linn, 1867-19468
- Munz, Philip A. (Philip Alexander), 1892-19748
- Stock, Chester, 1892-19508
- University of California, Berkeley8
- American Geophysical Union7
- Axelrod, Daniel I.7
- California Academy of Sciences7
- Hall, Clarence A.7