TY  - RPRT
TI  - Preliminary report on gamma-ray distribution in cylindrical cavities (drill holes)
AU  - Henry Faul
AU  - A.Y. Sakakura
PY  - 1951
DO  - 10.3133/tem135
UR  - https://pubs.usgs.gov/publication/tem135
ID  - tem135
ER  -