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, 1990
Buku Referensi
Encyclopedia of knowledge : volume 8
Grolier Incorporated, 1991
Buku Referensi
Encyclopedia of knowledge : volume 7
Grolier Incorporated, 1991
Buku Referensi