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  1. 1

    Report on the magnetic effects of the total solar eclipse of June 20, 1955

    Gepubliceerd in 1955
    Boek

    Report on the magnetic effects of the total solar eclipse of June 20, 1955
  2. 2

    Vertical control in Manila and vicinity with a preliminary list indicating locations and elevations of bench marks established by different organizations

    Gepubliceerd in 1945
    Boek

    Vertical control in Manila and vicinity with a preliminary list indicating locations and elevations of bench marks established by different organizations

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