TY - RPRT TI - Wildcat well penetration map showing wells drilled into and through potentially gas bearing, low-permeability Upper Cretaceous and Tertiary reservoirs, Sand Wash basin, Colorado AU - Theodore F. Tyler PY - 1979 DO - 10.3133/ofr791437 UR - https://pubs.usgs.gov/publication/ofr791437 ID - ofr791437 ER -