Deul, E. R. (1988). Interstellar dust and gas in the Milky Way and M33. Sterrewacht Leiden.
Chicago Style (17th ed.) CitationDeul, Erik Ronald. Interstellar Dust and Gas in the Milky Way and M33. Leiden: Sterrewacht Leiden, 1988.
MLA citiranjeDeul, Erik Ronald. Interstellar Dust and Gas in the Milky Way and M33. Sterrewacht Leiden, 1988.
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