Swiggett, G. L. Astronomy, meteorology, and seismology.
Lua i Stíl Chicago (17ú heag.)Swiggett, Glen Levin. Astronomy, Meteorology, and Seismology.
Lua MLA (8ú heag.)Swiggett, Glen Levin. Astronomy, Meteorology, and Seismology.
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