The Encyclopedia Americana : volume 4
Americana Corporation, 1977
Buku Referensi
The Encyclopedia Americana : volume 4
Americana Corporation, 1964
Buku Referensi
Collier's encyclopedia : volume 4
Macmillan Educational Company, 1990
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Grolier family encyclopedia : volume 4
Grolier Incorporated, 1995
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The World book encyclopedia : volume 4
World Book, 1985
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