TY - RPRT TI - Petrography, mineralogy, and reservoir characteristics of the Upper Cretaceous Mesaverde Group in the east-central Piceance Basin, Colorado AU - Janet K. Pitman AU - Charles W. Spencer AU - Richard M. Pollastro PY - 1989 DO - 10.3133/b1787g UR - https://pubs.usgs.gov/publication/b1787G ID - b1787G ER -