TY  - BOOK
AU  - Baldwin, R. T. 
AU  - Langel, R. A. 
TI  - Tables and maps of the DGRF 1985 and IGRF 1990
T2  - IAGA Bulletin; No. 54
PY  - 1993///
CY  - France
PB  - International Service for Geomagnetic Indices
KW  - Iaga Bulletin No.54DgrfIaga Bulletin-data
ER  -