[Title page] Minerals yearbook centennial edition 1981, pp. [i]-[ii]

Foreword, Horton, Robert C. pp. iii-iv

Acknowledgments, Schreck, Albert E. pp. v-vi

Contents, pp. vii-viii

Mining and quarrying trends in the metal and nonmetal industries, Martens, Charles D. pp. 1-25 ff.

Statistical summary, Ballard, Rose L. pp. 27-55 ff.

Abrasive materials, Smoak, J. Fletcher pp. 57-73 ff.

Aluminum, McCawley, Frank X.; Stephenson, Pamela A. pp. 75-91 ff.

Antimony, Plunkert, Patricia A. pp. 93-101 ff.

Asbestos, Clifton, R. A. pp. 103-112

Barite, Ampian, Sarkis G.; Morse, David E. pp. 113-121 ff.

Bauxite and alumina, Baumgardner, Luke H.; Hough, Ruth A. pp. 123-134

Beryllium, Petkof, Benjamin pp. 135-138

Bismuth, Carlin, James F., Jr. pp. 139-142

Boron, Lyday, Phyllis A. pp. 143-154

Bromine, Lyday, Phyllis A. pp. 155-162

Cadmium, Reese, Robert pp. 163-169 ff.

Calcium and calcium compounds, Pressler, J. W. pp. 171-175 ff.

Cement, Absalom, Sandra T. pp. 177-207 ff.

Chromium, Papp, John F. pp. 209-221 ff.

Clays, Ampian, Sarkis G. pp. 223-255 ff.

Cobalt, Sibley, Scott F.; Kirk, William S. pp. 257-266

Columbium and tantalum, Jones, Thomas S.; Cunningham, Larry D. pp. 267-277 ff.

Copper, Butterman, W. C. pp. 279-307 ff.

Diatomite, Meisinger, A. C. pp. 309-311 ff.

Feldspar, nepheline syenite, and aplite, Potter, Michael J. pp. 313-321 ff.

Ferroalloys, Brown, Raymond E. pp. 323-338

Fluorspar, Pelham, Lawrence pp. 339-348

Gallium, Petkof, Benjamin pp. 349-351 ff.

Gem stones, Pressler, J. W. pp. 353-364

Gold, Lucas, J. M. pp. 365-391 ff.

Graphite, Taylor, Harold A., Jr. pp. 393-403 ff.

Gypsum, Pressler, J. W. pp. 405-415 ff.

Helium, Tully, Philip C. pp. 417-423 ff.

Iron ore, Klinger, F. L. pp. 425-445 ff.

Iron oxide pigments, Spinrad, William I., Jr. pp. 447-454

Iron and steel, Schottman, Frederick J. pp. 455-471 ff.

Iron and steel scrap, Cooper, Franklin D. pp. 473-493 ff.

Iron and steel slag, Collins, Cynthia T. pp. 495-504

Kyanite and related materials, Potter, Michael J. pp. 505-508

Lead, Rathjen, John A.; Woodbury, William D. pp. 509-536

Lime, Pressler, J. W. pp. 537-549 ff.

Lithium, Ferrell, John E.; Searls, James P. pp. 551-556

Magnesium, Petkof, Benjamin pp. 557-563 ff.

Magnesium compounds, Petkof, Benjamin pp. 565-572

Manganese, Jones, Thomas S. pp. 573-584

Mercury, Carrico, Linda C. pp. 585-591 ff.

Mica, Johnson, Wilton pp. 593-601 ff.

Molybdenum, O'Donnell, James A. pp. 603-614

Nickel, Sibley, Scott F. pp. 615-627 ff.

Nitrogen, Davis, Charles L. pp. 629-636

Peat, Davis, Charles L. pp. 637-643 ff.

Perlite, Meisinger, A. C. pp. 645-648

Phosphate rock, Stowasser, William F. pp. 649-666

Platinum-group metals, Loebenstein, J. Roger pp. 667-678

Potash, Searls, James P. pp. 679-692

Pumice and pumicite, Meisinger, Arthur C. pp. 693-696

Rare-earth minerals and metals, Hedrick, James B. pp. 697-707 ff.

Rhenium, Torres, Ivette E. pp. 709-712

Salt, Kostick, Dennis S. pp. 713-723 ff.

Sand and gravel, Tepordei, Valentin V. pp. 725-740

Silicon, Murphy, Gerald F. pp. 741-749 ff.

Silver, Drake, Harold J. pp. 751-766

Sodium compounds, Kostick, Dennis S. pp. 767-774

Stone, Taylor, Harold A., Jr.; Tepordei, Valentin V. pp. 775-805 ff.

Sulfur, Morse, David E.; Shelton, John E. pp. 807-826

Talc and pyrophyllite, Clifton, Robert A. pp. 827-831 ff.

Thorium, Kirk, William S. pp. 833-838

Tin, Carlin, James F., Jr. pp. 839-852

Titanium, Lynd, Langtry E.; Hough, Ruth A. pp. 853-867 ff.

Tungsten, Stafford, Phillip T. pp. 869-881 ff.

Vanadium, Kuck, Peter H. pp. 883-892

Vermiculite, Meisinger, A. C. pp. 893-896

Zinc, Jolly, James H. pp. 897-925 ff.

Zirconium and hafnium, Kirk, William S. pp. 927-937 ff.

Other metals, pp. 939-953 ff.

Other nonmetals, pp. 955-968