TY  - RPRT
TI  - Seismic refraction survey of the pre-Cretaceous basement surface near the inner edge of the coastal plain in Stafford and King George Counties, Virginia
AU  - Hans D. Ackermann
AU  - Muriel S. Grim
PY  - 1977
DO  - 10.3133/ofr77480
UR  - https://pubs.usgs.gov/publication/ofr77480
ID  - ofr77480
ER  -