The World book encyclopedia : volume 19, W-X-Y-Z
Field Enterprises Educational Corporation, 1963
 Buku Referensi
Encyclopaedia Britannica : volume 19
Encyclopaedia Britannica Inc., 1967
 Buku Referensi
Encyclopaedia Britannica : volume 19
Encyclopaedia Britannica Inc., 1968
 Buku Referensi
Encyclopaedia universalis : volume 19
Encyclopaedia Universalis France S.A. , 1989
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The encyclopedia American
Americana Corporation, 1980
 Buku Referensi
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