TY  - BOOK
AU  - Langel, R. A.
TI  - The main geomagnetic field
CY  - New Jersey
PB  - Academic Press
KW  - Laplaces's EquationNatural Orthogonal ComponentsPersonal Collection Prof. B.P.SinghSpherical HarmonicsSolar Cycle
N1  - Personal Collection:Prof. B.P.Singh
ER  -