Geological Survey Bulletin 1021-I Geology of Devils Tower National Monument, Wyoming

Carpenter, F. R., 1888, Notes on the geology of the Black Hills: Preliminary report of time South Dakota School of Mines, Rapid City, S. Dak.

Darton, N. H., 1909, Geology and water resources of the northern portion of the Black Hills and adjoining regions in South Dakota and Wyoming: U. S. Geol. Survey Prof. Paper 65.

Darton, N. H., and O'Harra, C. C., 1907, Description of the Devils Tower quadrangle, Wyoming: U. S. Geol. Survey Geol. Atlas, folio 150.

Dutton, C. E., and Schwartz, G. M., 1936, Notes on the jointing of the Devil's Tower, Wyoming: Jour. Geology, v. 44, no. 6, p. 717—728.

Imlay, H. W., 1947, Marine Jurassic of the Black Hills area, South Dakota and Wyoming: Am. Assoc. Petroleum Geologists Bull., v. 31, no. 2, p. 227—273.

Jaggar, T. A., Jr., 1901, Laccoliths of the Black Hills: U. S. Geol. Survey 21st Ann. Report, pt. 3, p. 163—290.

Pirsson, L. V., 1894, On some phonolite rocks from the Black Hills: Am. Jour. Sci., 3d ser., v. 47, p. 341—346.

Zuidema, H. P., 1948, The touring public discovers Mato Tipi (Devils Tower, Wyo.): Earth Science Digest, v. 3, no. 1, p. 3—7.