The Encyclopedia Americana : volume 28
Americana Corporation, 1977
Buku Referensi
The Encyclopedia Americana : volume 28
Americana Corporation, 1964
Buku Referensi
The Encyclopedia Americana : the international reference work, volume 28
Americana Corporation, 1960
Buku Referensi
Encyclopaedia universalis : volume 28
Encyclopaedia Universalis France S.A. , 1989
Buku Referensi
The New Encyclopaedia Britannica : volume 28
Encyclopaedia Britannica Inc., 1988
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