TY  - RPRT
TI  - Map and tables showing preliminary results of potassium-argon age studies in the Circle Quadrangle, Alaska, with a compilation of earlier dating work
AU  - Frederic H. Wilson
AU  - Nora B. Shew
PY  - 1981
DO  - 10.3133/ofr81889
UR  - https://pubs.usgs.gov/publication/ofr81889
ID  - ofr81889
ER  -