TY  - RPRT
TI  - Evaluation of models proposed for the 1991 revision of the International Geomagnetic Reference Field
AU  - N.W. Peddie
PY  - 1992
DO  - 10.5636/jgg.44.793
UR  - https://pubs.usgs.gov/publication/70016888
ID  - 70016888
ER  -