THE SECULAR VARIATION OF THE MAGNETIC ELEMENTS IN SOUTH AFRICA DURING THE PERIOD 1900–1913
1914 ◽
Vol 4
(1)
◽
pp. 181-203
◽
1950 ◽
Vol 55
(1)
◽
pp. 57-64
◽
1942 ◽
Vol 29
(4)
◽
pp. 261-278
◽
Keyword(s):
1949 ◽
Vol 54
(4)
◽
pp. 408-408
1950 ◽
Vol 55
(3)
◽
pp. 275-299
◽
Keyword(s):
2009 ◽
2011 ◽
Vol 1
(2)
◽
pp. 47-54