GINGERICH, O. Cosmology +1#Owen Gingerich. W.H.Freeman and Company.
Lua i Stíl Chicago (17ú heag.)GINGERICH, Owen. Cosmology +1#Owen Gingerich. W.H.Freeman and Company.
Lua MLA (8ú heag.)GINGERICH, Owen. Cosmology +1#Owen Gingerich. W.H.Freeman and Company.
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