TY - BOOK AU - Burton, William C. CN - I 19.76: CY - [Reston, VA] : CY - [Denver, Colo. : DA - 1994] ID - 197028 KW - Geology KW - Geology N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 94-0790-M. N1 - Imprint date from transmittal sheet. PB - U.S. Dept. of the Interior, U.S. Geological Survey ; PB - Books and Open-File Reports Section, distributor, PP - [Reston, VA] : PP - [Denver, Colo. : PY - 1994] T1 - Preliminary bedrock geologic map of the Wightman 7.5' quadrangle, Virginia TI - Preliminary bedrock geologic map of the Wightman 7.5' quadrangle, Virginia VL - 93-614 ER -