TY  - GEN
T1  - Geologic map of the Loudoun County portion of the Middleburg quadrangle, Virginia
DA  - 1990.
CY  - [Reston, VA :
CY  - Denver, Colo. :
AU  - Kline, Stephen W.
AU  - Lyttle, Peter T.
AU  - Froelich, A. J.
VL  - 90-641
CN  - I 19.76:
PB  - The Survey ;
PB  - USGS Information Services],
PP  - [Reston, VA :
PP  - Denver, Colo. :
PY  - 1990.
N1  - Includes text, bibliographical references, location map, description and correlation of map units.
ID  - 217378
KW  - Geology
TI  - Geologic map of the Loudoun County portion of the Middleburg quadrangle, Virginia
ER  -