TY  - RPRT
TI  - Map Showing Construction Materials and Nonmetallic Mineral Resources of Colorado
AU  - David M. Larrabee
AU  - S.E. Clabaugh
AU  - W. R. Griffitts
AU  - and others
PY  - 1947
DO  - 10.3133/mb10
UR  - https://pubs.usgs.gov/publication/mb10
ID  - mb10
ER  -