Geology and mineral deposits of an area in the Departments of Antioquia and Caldas (Subzone IIB), Colombia [unknown]

Tomas Feininger, Dario Barrero L., Nestor Castro, R.B. Hall
1973 Antarctica A Keystone in a Changing World   unpublished
doi:10.3133/ofr7369 fatcat:5dyf4kmop5ctvhwr3mag5l23gi