Funk & Wagnalls new encyclopedia : volume 1
Funk & Wagnalls, 1983
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The New Encyclopedia Britannica : propedia
Encyclopedia Britannica, 1983
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The Encyclopedia Americana : volume 1
Americana Corporation, 1977
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The Encyclopedia Americana : volume 1
Americana Corporation, 1964
Buku Referensi
Collier's encyclopedia : volume 1
Macmillan Educational Company, 1990
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