The 1982.5 geomagnetic normal field of the federal republic of germany and the secular variation field from 1965 to 1992
1997 ◽
Vol 49
(1)
◽
pp. 5-20
◽
1994 ◽
Vol 33
(03)
◽
pp. 312-314
◽
1963 ◽
Vol 02
(02)
◽
pp. 49-51
◽
1982 ◽
Vol 14
(4)
◽
pp. 83-86
◽
1978 ◽
Vol 34
(4)
◽
pp. 768-769
1997 ◽
Vol 74
(2)
◽
pp. 146-155