TY  - RPRT
TI  - Geologic map of the Bucaramanga Quadrangle H-12, Colombia
AU  - D.E. Ward
AU  - Richard Goldsmith
AU  - Andres V. Jimeno
AU  - Jaime B. Cruz
AU  - Hernan Restrepo
AU  - Eduardo R. Gomez
PY  - 1977
DO  - 10.3133/i1005
UR  - https://pubs.usgs.gov/publication/i1005
ID  - i1005
ER  -