TY  - RPRT
TI  - Median-porosity contour maps of the J Sandstone, Dakota Group, in the Denver Basin, Colorado, Nebraska, and Wyoming
AU  - D.K. Higley
AU  - D. L. Gautier
PY  - 1987
DO  - 10.3133/mf1982
UR  - https://pubs.usgs.gov/publication/mf1982
ID  - mf1982
ER  -