TY  - RPRT
TI  - Operation of U.S. Geological Survey unmanned digital magnetic observatories
AU  - L.R. Wilson
PY  - 1990
DO  - 10.1016/0031-9201(90)90207-e
UR  - https://pubs.usgs.gov/publication/70015890
ID  - 70015890
ER  -