TY  - RPRT
TI  - IRIS/USGS plans for upgrading the Global Seismograph Network
AU  - Jon Peterson
AU  - Charles R. Hutt
PY  - 1989
DO  - 10.3133/ofr89471
UR  - https://pubs.usgs.gov/publication/ofr89471
ID  - ofr89471
ER  -