Guide to the Pflaum Publishing Company publications, 1889-1971, CSC.034. Roesch Library.
Lua i Stíl Chicago (17ú heag.)Guide to the Pflaum Publishing Company Publications, 1889-1971, CSC.034. Roesch Library.
Lua MLA (8ú heag.)Guide to the Pflaum Publishing Company Publications, 1889-1971, CSC.034. Roesch Library.
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