The Encyclopedia Americana : volume 28
Americana Corporation, 1964
Buku Referensi
The Encyclopedia Americana : volume 28
Grolier, 1994
Buku Referensi
The Encyclopedia Americana : the international reference work, volume 28
Americana Corporation, 1960
Buku Referensi
The encyclopedia American
Americana Corporation, 1980
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The Columbia encyclopedia
Columbia University Press, 1950
Buku Referensi