Valentijn, E. A. (1978). Radio investigations of clusters of galaxies. Elve/Labor Vincit.
Lua i Stíl Chicago (17ú heag.)Valentijn, Edwin Auguste. Radio Investigations of Clusters of Galaxies. Leiden: Elve/Labor Vincit, 1978.
Lua MLA (8ú heag.)Valentijn, Edwin Auguste. Radio Investigations of Clusters of Galaxies. Elve/Labor Vincit, 1978.
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