Phosphate rock in Colombia: a preliminary report /
Cathcart, James Bachelder,1917-
Zambrano O., Francisco.
Mojica G, Pedro E.Phosphate occurrence at Turmequé.
Instituto Geológico Nacional (Colombia)
Geological Survey (U.S.)
United States.Agency for International Development.
Washington, U.S. Govt. Print. Off.,
1969.
Prepared in cooperation with the Servicio Geologico Nacional of Columbia, under the auspices of the Government of Colombia and the Agency for International Development, U.S. Department of State.
Bibliography: p. 71-73.
Phosphates