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  - Mojica G. Pedro E.
PY  - 1969
DO  - 10.3133/b1272a
UR  - https://pubs.usgs.gov/publication/b1272A
ID  - b1272A
ER  -