- Ebert, Fred Charles, 1921, Records of water levels in wells in southern California: Govt. Print. Off., Water Supply Paper 468, 156 p. :IV pl. (incl. fold. map (in pocket) 3 fold. diagr.) tables. ;23 cm.,
- Geological Survey (U.S.), 1921, Surface water supply of the United States, 1917, Part IX, Colorado River basin: U.S. Govt. Print. Off., Water Supply Paper 459, 192 p. ;23 cm.,
- Geological Survey (U.S.), 1921, Surface water supply of the United States, 1917 : Part 10, The Great Basin: U.S. Govt. Print. Off., Water Supply Paper 460, 277 p. ;23 cm.,
- Geological Survey (U.S.), 1921, Surface water supply of the United States, 1917 : Part XII. North Pacific slope drainage basins ; A. Pacific basins in Washington and upper Columbia River basin: U.S. G.P.O., Water Supply Paper 462, 181, li p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1921, Surface water supply of the United States, 1918, Part I, North Atlantic slope basins: U.S. Govt. Print. Off., Water Supply Paper 471, 183 p. ;23 cm.,
- Geological Survey (U.S.), 1921, Surface water supply of the United States, 1918, Part V, Hudson Bay and upper Mississippi River basin: U.S. Govt. Print. Off., Water Supply Paper 475, 153 p. ;23 cm.,
- Geological Survey (U.S.), 1921, Surface water supply of the United States, 1918, Part VI, Missouri River basin: U.S. G.P.O., Water Supply Paper 476, 266, xliv p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1921, Surface water supply of the United States, 1918 : Part XI, Pacific slope basins in California: U.S. Govt. Print. Off., Water Supply Paper 481, 314, xxxviii p. : 24 cm.,
- Grover, Nathan C., 1921, Contributions to the hydrology of the United States, 1919: U.S. Govt. Printing. Off., Water Supply Paper 450, 86 p. :ill. ;23 cm.,
- Grover, Nathan C.; Lamb, W.A.; Follansbee, Robert, 1921, Surface water supply of the United States, 1917, Part VI, Missouri River basin: U.S. G.P.O., Water Supply Paper 456, 242, xlii p. :ill. ;23 cm.,
- McGlashan, Harry Deyoe, 1921, Surface water supply of the Pacific slope of southern California: Govt. Print. Off., Water Supply Paper 447, 557 p. :XVIII pl. (incl. 2 fold. maps (in pocket)) tables. ;23 cm.,
- Palmer, Harold Schjoth, 1921, Ground water in the Southington-Granby area, Connecticut: Govt. Print. Off., Water Supply Paper 466, 219 p. :illus., VII pl. (incl. 3 fold. maps) tables, diagrs. ;23 cm.,
- Schwennesen, A. T., 1921, Geology and water resources of the Gila and San Carlos valleys in the San Carlos Indian Reservation, Arizona: U.S. Govt. Printing. Off., Water Supply Paper 450-A, p. 1-27; 86 p. :ill. ;23 cm.,
- Thompson, D. G., 1921, Ground water in Lanfair Valley, California: U.S. Govt. Printing. Off., Water Supply Paper 450-B, p. 29-50; 86 p. :ill. ;23 cm.,
- Thompson, David Grosh, 1921, Routes to desert watering places in the Mohave Desert Region, California: Govt. print. off., Water Supply Paper 490-B, vii, 4, 87-269 p. :pl. i-iv, viii-xviii (incl. fold. maps) ;23 cm.,
- Waring, G. A., 1921, Ground water in Pahrump, Mesquite, and Ivanpah valleys, Nevada and California: U.S. Govt. Printing. Off., Water Supply Paper 450-C, p. 51-86; 86 p. :ill. ;23 cm.; including title page, contents, list of illustrations, and index to volume,
