TY  - GEN
TY  - GEN
T1  - Geomagnetic secular variation described by dipole models
T2  - Report series in geophysics / University of Helsinki, Department of Geophysics
A1  - Nevanlinna, Heikki, 1947-
LA  - eng
PP  - Helsinki
PB  - University of Helsinki
YR  - 1980
UL  - https://kansalliskirjasto.finna.fi/Record/helka.99616603506253
NO  - Tiivistelmä ja 4 erip.
SN  - 951-45-2107-2 pehmeäkantinen
ER  -