TY - BOOK AU - Force,Eric R. ED - United States TI - Contributions to the geology of mineral deposits T2 - 1558 U1 - 557.3 23 PY - 1984///. CY - Washington: PB - United States Government Printing Office, KW - Copper ores KW - Tropics KW - Indonesia KW - Porphyry KW - Rutile KW - Titanium ores KW - United States N1 - Includes bibliographical references (p. B8-B11); -- V.1 Exploration for Porphyry Metal Deposits Based on Rutile Distribution: a test in Sumatera/ by Eric. R. Force, Sukirno Djaswadi and Theo van Leeuwen -- v.2 Titanium Mineral Resources of the United States: definitions and documentation/ by Eric R. Force and Langtry E. Lynd ER -