TY  - RPRT
TI  - Test and calibration of the Digital World-Wide Standardized Seismograph
AU  - Jon Peterson
AU  - Charles R. Hutt
PY  - 1982
DO  - 10.3133/ofr821087
UR  - https://pubs.usgs.gov/publication/ofr821087
ID  - ofr821087
ER  -