TY  - RPRT
TI  - Paleontologic and stratigraphic relations of phosphate beds in Upper Cretaceous rocks of the Cordillera Oriental, Colombia
AU  - Edwin K. Maughan
AU  - Francisco Zambrano O.
AU  - Pedro Mojica G.
AU  - Jacob Abozaglo M.
AU  - Fernando Pachon P.
AU  - Raul Duran R.
PY  - 1979
DO  - 10.3133/ofr791525
UR  - https://pubs.usgs.gov/publication/ofr791525
ID  - ofr791525
ER  -