Stratigraphy and structure of North Dakota,
by Wilson M. Laird.
- [Grand Forks, 1944].
- [12] p. incl. ill. (maps) tab., diagrs. 26 cm.
- North Dakota. Geological Survey. Bulletin 18 .
On cover: Reprinted from National oil scouts and landmen's association yearbook, vol. 14, pp. 420-430, 1944. Reproduced from type-written copy.