TY  - RPRT
TI  - Generalized map showing Precambrian rocks and metamorphic facies, keyed to aluminosilicate minerals in meta-shales with excess alumina, northern Park Range, Colorado
AU  - George L. Snyder
PY  - 1980
DO  - 10.3133/ofr80787
UR  - https://pubs.usgs.gov/publication/ofr80787
ID  - ofr80787
ER  -