Charles Butts Ralph Arnold N. M. Fenneman H. S. Gale W. T. Lee F. C. Schrader W. C. Phalen G. H. Ashley F. B. Peck G. B. Richardson J. A. Taff N. H. Darton C.A. Fisher A.G. Leonard A. C. Veatch M. R. Campbell 1906 <p>No abstract available.</p> application/pdf 10.3133/b285F en U.S. Geological Survey Contributions to economic geology, 1905: Coal, lignite, and peat reports