[Title page] Minerals yearbook 1968, pp. [I]-[II]

Foreword, O'Leary, John F. pp. III ff.

Acknowledgments, Schreck, Albert E. pp. V ff.

Contents, pp. VII-VIII

Review of the mineral industries, Hee, Olman; Baker, Jeannette I. pp. 1-60

Technologic trends in the mineral industries (metals and nonmetals except fuels), Morning, John L. pp. 61-84

Statistical summary, D'Amico, Kathleen J. pp. 85-123 ff.

Injury experience and worktime in the mineral industries, Moyer, Forrest T. pp. 125-138

Abrasive materials, Wells, J. Robert pp. 139-150

Aluminum, Parker, John G. pp. 151-170

Antimony, Davis, L. E. pp. 171-178

Asbestos, Icke, Paul W. pp. 179-188

Barite, Diamond, W. Gene pp. 189-194

Bauxite, Parker, John G. pp. 195-206

Beryllium, Meeves, Henry C. pp. 207-211 ff.

Bismuth, Schroeder, Harold J. pp. 213-216

Boron, West, J. M. pp. 217-220

Bromine, Olson, Keith S. pp. 221-224

Cadmium, Moulds, Donald E. pp. 225-230

Calcium and calcium compounds, Petkof, Benjamin pp. 231-233 ff.

Carbon black, Harper, William B. pp. 235-245 ff.

Cement, Lewis, John R. pp. 247-271 ff.

Chromium, Morning, John L. pp. 273-282

Clays, Wells, J. Robert pp. 283-300

Coal--bituminous and lignite, Young, W. H.; Gallagher, J.J. pp. 301-377 ff.

Coal--Pennsylvania anthracite, Lorenz, Walter C. pp. 379-403 ff.

Cobalt, DeHuff, Gilbert L. pp. 405-410

Coke and coal chemicals, Westerstrom, Leonard pp. 411-448

Columbium and tantalum, Stevens, Richard F., Jr. pp. 449-462

Copper, Cole, John W. pp. 463-493 ff.

Diatomite, West, J. M. pp. 495-497 ff.

Feldspar, nepheline syenite, and aplite, Wells, J. Robert pp. 499-504

Ferroalloys, Thatcher, John W. pp. 505-514

Fluorspar and cryolite, Wells, J. Robert pp. 515-522

Gem stones, Petkof, Benjamin pp. 523-527 ff.

Gold, Ryan, J. Patrick pp. 529-549 ff.

Graphite, Weaver, Lewis K. pp. 551-557 ff.

Gypsum, Allsman, Paul L. pp. 559-566

Helium, Moore, Billy J. pp. 567-570

Iron ore, Morning, John L. pp. 571-592

Iron and steel, Thatcher, John W. pp. 593-610

Iron and steel scrap, Thatcher, John W. pp. 611-622

Iron oxide pigments, Thatcher, John W. pp. 623-626

Kyanite and related minerals, Sweeney, John W. pp. 627-630

Lead, Moulds, Donald E. pp. 631-657 ff.

Lime, Allsman, Paul L. pp. 659-668

Magnesium, Cole, John W. pp. 669-674

Magnesium compounds, Cole, John W. pp. 675-681 ff.

Manganese, DeHuff, Gilbert L. pp. 683-692

Mercury, West, J. M. pp. 693-701 ff.

Mica, Petkof, Benjamin pp. 703-711 ff.

Molybdenum, Morning, John L. pp. 713-721 ff.

Natural gas, Harper, William B.; Fanelli, Leonard L. pp. 723-750

Natural gas liquids, Harper, William B.; Fanelli, Leonard L. pp. 751-767 ff.

Nickel, DeHuff, Gilbert L. pp. 769-779 ff.

Nitrogen, Lewis, John R. pp. 781-793 ff.

Peat, Gallagher, Joseph J. pp. 795-804

Perlite, Henkes, William C. pp. 805-807 ff.

Crude petroleum and petroleum products, Kirby, James G.; Moore, Betty M. pp. 809-920

Phosphate rock, Eilertsen, Donald E. pp. 921-931 ff.

Platinum-group metals, Ryan, J. Patrick pp. 933-942

Potash, Eilertsen, Donald E. pp. 943-953 ff.

Pumice, Bieniewski, Carl L. pp. 955-959 ff.

Rare-earth minerals and metals, Parker, John G. pp. 961-968

Salt, Petkof, Benjamin pp. 969-977 ff.

Sand and gravel, Allsman, Paul L. pp. 979-996

Silicon, Thatcher, John W. pp. 997-1001 ff.

Silver, Ryan, J. Patrick pp. 1003-1018

Slag--iron and steel, Thatcher, John W. pp. 1019-1023 ff.

Sodium and sodium compounds, Petkof, Benjamin pp. 1025-1027 ff.

Stone, Allsman, Paul L. pp. 1029-1048

Sulfur and pyrites, Eilertsen, Donald E. pp. 1049-1060

Talc, soapstone, and pyrophyllite, Hartwell, John W. pp. 1061-1066

Thorium, Stevens, Richard F., Jr. pp. 1067-1072

Tin, Lewis, John R. pp. 1073-1087 ff.

Titanium, Parker, John G. pp. 1089-1101 ff.

Tungsten, Stevens, Richard F. pp. 1103-1116

Uranium, Stevens, Richard F., Jr. pp. 1117-1140

Vanadium, DeHuff, Gilbert L. pp. 1141-1147 ff.

Vermiculite, Hale, William N. pp. 1149-1150

Zinc, Moulds, Donald E. pp. 1151-1178

Zirconium and hafnium, Parker, John G. pp. 1179-1185 ff.

Minor metals, Cole, John W.; Stevens, Richard F., Jr. pp. 1187-1199 ff.

Minor nonmetals, Petkof, Benjamin pp. 1201-1208