TY  - RPRT
TI  - Calibration constants for the Geodata International, Inc., and Texas Instruments, Inc.: High sensitivity systems used for the ERDA aerial gamma-ray surveys
AU  - Joseph S. Duval
AU  - Karen A. Schulz
AU  - James A. Pitkin
PY  - 1977
DO  - 10.3133/ofr77159
UR  - https://pubs.usgs.gov/publication/ofr77159
ID  - ofr77159
ER  -