TY  - RPRT
TI  - Early Mesozoic basins workshop fieldtrip No. 1; Field guide to the igneous rocks of the southern Culpeper basin, Virginia
AU  - Richard P. Tollo
AU  - David Gottfried
AU  - Albert J. Froelich
PY  - 1987
DO  - 10.3133/ofr87251
UR  - https://pubs.usgs.gov/publication/ofr87251
ID  - ofr87251
ER  -