TY  - RPRT
TI  - A model of geomagnetic secular variation for 1980-1983
AU  - N.W. Peddie
AU  - A.K. Zunde
PY  - 1987
DO  - 10.1016/0031-9201(87)90155-5
UR  - https://pubs.usgs.gov/publication/70014179
ID  - 70014179
ER  -