Lua APA (7ú heag.)

Não informado. (1949). Geophysical research papers. Air Force Cambridge, Geophysics Research Directorate.

Lua i Stíl Chicago (17ú heag.)

Não informado. Geophysical Research Papers. Cambridge, Mass: Air Force Cambridge, Geophysics Research Directorate, 1949.

Lua MLA (8ú heag.)

Não informado. Geophysical Research Papers. Air Force Cambridge, Geophysics Research Directorate, 1949.

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