Preliminary lithogeochemical map showing near-surface rock types in the Chesapeake Bay watershed, Virginia and Maryland [unknown]

John D. Peper, Lucy McCartan, J. Wright Horton, James E. Reddy
2001 Antarctica A Keystone in a Changing World   unpublished
doi:10.3133/ofr01187 fatcat:yqifchzdgfcdvoe7tireqneeea