TY - RPRT TI - Geologic map of the Highlands Ranch quadrangle, Arapahoe and Douglas Counties, Colorado AU - John O. Maberry AU - Robert M. Lindvall PY - 1977 DO - 10.3133/gq1413 UR - https://pubs.usgs.gov/publication/gq1413 ID - gq1413 ER -