Geologic atlas of U.S.
Subtitle: Washington folio, D.C.-Maryland-Virginia.
Contributors: Darton, Nelson Horatio, 1865-1948.; Keith, Arthur.
Series: Geologic Atlas of U.S. Folio No. 70
Publisher: [s.n.]
Published: 1901
Place of publication: Washington, D.C
Format: Microform
Subjects: Geological mapping -- Washington (D.C.); Geological mapping -- Maryland.; Geological mapping -- Virginia.