The Encyclopedia Americana : volume 16
Americana Corporation, 1964
 Buku Referensi
Collier's encyclopedia : volume 16
Macmillan Educational Company, 1990
 Buku Referensi
Encyclopedia of knowledge : volume 16
Grolier Incorporated, 1991
 Buku Referensi
The Encyclopedia Americana : volume 16
Grolier, 1994
 Buku Referensi
The World book encyclopedia : volume 16, S
Field Enterprises Educational Corporation, 1963
 Buku Referensi
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