TY  - RPRT
TI  - Geology and mineral resources of central Antioquia Department (Zone IIA), Colombia
AU  - R.B. Hall
AU  - Jairo Alvarez A.
AU  - Hector Rico H.
PY  - 1973
DO  - 10.3133/ofr7397
UR  - https://pubs.usgs.gov/publication/ofr7397
ID  - ofr7397
ER  -