TY  - RPRT
TI  - International geomagnetic reference field 1980: a report by IAGA Division I working group.
AU  - N.W. Peddie
PY  - 1982
DO  - 10.1111/j.1365-246x.1982.tb06974.x
UR  - https://pubs.usgs.gov/publication/70011876
ID  - 70011876
ER  -