Ingpen, Robert
Encyclopedia of world events : eighty turning points in history
Dragon's World, 1995
 Buku Referensi
The World book encyclopedia : volume 7
World Book, 1985
 Buku Referensi
The World book encyclopedia : volume 7, G
Field Enterprises Educational Corporation, 1963
 Buku Referensi
The Cultural library : volume 8, the nations of the world
Parents' Magazine's Cultural Institute, 1965
 Buku Referensi
The Great family encyclopedic dictionary
Bay Books, 1986
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