TY  - RPRT
TI  - A multi-channel digital telemetry system for low frequency geophysical data
AU  - J. Roger
AU  - M.J.S. Johnston
AU  - C. Mortensen
AU  - G. Myren
PY  - 1977
DO  - 10.3133/ofr77490
UR  - https://pubs.usgs.gov/publication/ofr77490
ID  - ofr77490
ER  -