(1972). Map showing some points of geologic interest in the Morrison quadrangle, Jefferson county, Colorado. U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Map Showing Some Points of Geologic Interest in the Morrison Quadrangle, Jefferson County, Colorado. Washington, D.C: U.S. Geological Survey, 1972.
MLA-Zitierstil (9. Ausg.)Map Showing Some Points of Geologic Interest in the Morrison Quadrangle, Jefferson County, Colorado. U.S. Geological Survey, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.