TY  - RPRT
TI  - Plan of study for the regional aquifer-system analysis of the Appalachian Valley and Ridge, Piedmont, and Blue Ridge physiographic provinces of the eastern and southeastern United States, with a description of study-area geology and hydrogeology
AU  - L.A. Swain
AU  - E. F. Hollyday
AU  - C. C. Daniel
AU  - O. S. Zapecza
PY  - 1991
DO  - 10.3133/wri914066
UR  - https://pubs.usgs.gov/publication/wri914066
ID  - wri914066
ER  -