TY  - RPRT
TI  - Phosphate rock in Colombia - a preliminary report, with a section on the phosphate occurrence at Turmeque
AU  - James Bachelder Cathcart
AU  - Francisco Zambrano O.
AU  - Pedro Mojica G.
PY  - 1967
DO  - 10.3133/ofr6743
UR  - https://pubs.usgs.gov/publication/ofr6743
ID  - ofr6743
ER  -