The Encyclopedia Americana : volume 23
Americana Corporation, 1977
Buku Referensi
The Encyclopedia Americana : volume 23
Americana Corporation, 1964
Buku Referensi
Collier's encyclopedia : volume 23
Macmillan Educational Company, 1990
Buku Referensi
The World book encyclopedia : volume 23
World Book, 1985
Buku Referensi
The Encyclopedia Americana : the international reference work, volume 23
Americana Corporation, 1960
Buku Referensi