TY  - RPRT
TI  - A description of an extremely low frequency loop-loop geophysical system
AU  - J. Cooke
AU  - J. Bradley
AU  - C. Mitchell
AU  - R. Lescelius
PY  - 1981
DO  - 10.3133/ofr811130
UR  - https://pubs.usgs.gov/publication/ofr811130
ID  - ofr811130
ER  -