TY  - RPRT
TI  - Preliminary map showing sand and gravel deposits of North Dakota
AU  - D. M. Larrabee
AU  - L.C. Huff
AU  - C. Ahlman
PY  - 1946
DO  - 10.3133/mb3
UR  - https://pubs.usgs.gov/publication/mb3
ID  - mb3
ER  -