Levantamento magnetico do valle do Rio S. Francisco (Levé magnétique du bassin du Rio S. Francisco) Relatorio e resumo dos reultados. Observatorio nacional do Rio de Janeiro, Directoria de meteorologia e astronomia, Ministerio da agricultura, industria e comercio

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Gaudio, 1914 - 39 pages
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Contents

Section 1
3
Section 2
9
Section 3
31

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