Não informado. (1949). Geophysical research papers. Air Force Cambridge, Geophysics Research Directorate.
Chicago-referens (17:e uppl.)Não informado. Geophysical Research Papers. Cambridge, Mass: Air Force Cambridge, Geophysics Research Directorate, 1949.
MLA-referens (8:e uppl.)Não informado. Geophysical Research Papers. Air Force Cambridge, Geophysics Research Directorate, 1949.
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