TY - BOOK AU - Wells,Frederick J. TI - The long-run availability of phosphorus: a case study in mineral resource analysis SN - 0801816564 : U1 - 333.8 PY - 1975/// CY - Baltimore, Md. PB - Published for Resources for the Future by the Johns Hopkins University Press KW - Phosphates KW - Phosphorus N1 - Includes bibliographical references and index ER -