THE SECULAR VARIATION OF THE MAGNETIC ELEMENTS IN SOUTH AFRICA DURING THE PERIOD 1900–1913
Published in Transactions of the Royal Society of South Africa, in 1914, in volume 4, issue 1, pages 181-203
Date published:1914
Published in Transactions of the Royal Society of South Africa, in 1914, in volume 4, issue 1, pages 181-203
Date published:1914