TY  - RPRT
TI  - Assessment of models proposed for the 1981 revision of the IGRF
AU  - N.W. Peddie
AU  - E.B. Fabiano
PY  - 1982
DO  - 10.5636/jgg.34.387
UR  - https://pubs.usgs.gov/publication/70011242
ID  - 70011242
ER  -