TY  - RPRT
TI  - Calibration of seismographic systems : USGS stations in the central California network
AU  - J. H. Healy
AU  - M. E. O'Neill
PY  - 1977
DO  - 10.3133/ofr77736
UR  - https://pubs.usgs.gov/publication/ofr77736
ID  - ofr77736
ER  -