TY  - RPRT
TI  - Assessment of models proposed for the 1985 revision of the international geomagnetic reference field
AU  - N.W. Peddie
AU  - A.K. Zunde
PY  - 1987
DO  - 10.1016/0031-9201(87)90156-7
UR  - https://pubs.usgs.gov/publication/70014206
ID  - 70014206
ER  -