TY  - RPRT
TI  - Introductory note; Ocher deposits of eastern Pennsylvania; Paint-ore deposits near Lehigh Gap, Pennsylvania; Survey publications on mineral paint
AU  - J.C. Stoddard
AU  - A.C. Callen
AU  - Fred T. Agthe
AU  - John L. Dynan
PY  - 1910
DO  - 10.3133/b430g
UR  - https://pubs.usgs.gov/publication/b430G
ID  - b430G
ER  -