Sources of fertilizer minerals in South America : a preliminary study : geology and technology of fertilizer-mineral deposits of phosphates, potash, and sulfur and suggestions for further exploration in South America / by J.F. Harrington, D.E. Ward, and V.E. McKelvey.

James F Harrington (James Foster), 1916-2002 [author] D. E. Ward [author]

Washington, D.C. : United States Department of the Interior, Geological Survey 1966

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