Collier's encyclopedia : volume 1
Macmillan Educational Company, 1990
 Buku Referensi
Encyclopaedia universalis : volume 1
Encyclopaedia Universalis France S.A. , 1989
 Buku Referensi
Encyclopedia of knowledge : volume 1
Grolier Incorporated, 1991
 Buku Referensi
Ensiklopedi Indonesia; Jilid 1
Ichtiar Baru-Van Hoeve, 1980
 Buku Referensi
The Cultural library : volume 10, man and his culture. index
Parents' Magazine's Cultural Institute, 1965
 Buku Referensi
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