TERRESTRIAL ISOMAGNETIC LINES FOR SOUTH AFRICA FOR THE EPOOH JULY 1, 1903
Beattie, J. C.
Article
1910
Transactions of the Royal Society of South Africa
2
283--286
BioStor
English
Cape Town, Royal Society of South Africa,
BioStor: https://biostor.org/reference/167250 DOI: https://doi.org/10.1080/00359191009519387
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