TY  - RPRT
TI  - Preliminary map showing geology and construction materials of the Wray no. 3 and Wray no. 4 quadrangles, Colorado-Nebraska
AU  - Dorothy R. Townsend
AU  - Jessie M. Tompkin
PY  - 1951
DO  - 10.3133/ofr5111
UR  - https://pubs.usgs.gov/publication/ofr5111
ID  - ofr5111
ER  -