Davis M. Lapham

• Chemical analyses of three Triassic(?) diabase dikes in Pennsylvania
• Chemical analyses of three Triassic(?) diabase dikes in Pennsylvania / by Davis M. Lapham and Timothy E. Saylor
• Common rocks and minerals of Pennsylvania
• Geology and origin of the triassic magnetite deposit and diabase at Cornwall, Pennsylvania
• Geology and origin of the Triassic magnetite deposit and diabase at Cornwall, Pennsylvania / by Davis M. Lapham and Carlyle Gray
• Interpretation of K-Ar and Rb-Sr isotopic dates from a Precambrian basement core, Erie County, Pennsylvania
• Interpretation of K-Ar and Rb-Sr isotopic dates from a Precambrian basement core, Erie County, Pennsylvania / by Davis M. Lapham
• Mineral collecting in Pennsylvania
• Mineralogy associated with burning anthracite deposits of eastern Pennsylvania
• Mineralogy associated with burning anthracite deposits of eastern Pennsylvania / by Davis M. Lapham and John H. Barnes, Pennsylvania Geological Survey, Wayne F. Downey, Jr., R.E. Wright Associates, Inc. [and] Robert B. Finkelman, U.S. Geological Survey
• Summary of isotopic age determinations in Pennsylvania
• Summary of isotopic age determinations in Pennsylvania by D.M. Lapham and S.I. Root.