• Creator
  • Maryland Geological Survey; Bauer, L. A. 1865-1932; Besley, F. W. 1872-1960; Bonsteel, Jay A. (Jay Allan), 1873-; Grover, Nathan Clifford, 1868-1956; Miller, Benjamin L. 1874-1944; Nunn, Roscoe
  • Publisher
  • Baltimore,The Johns Hopkins press,1926