Encyclopaedia Britannica : volume 1
Encyclopaedia Britannica Inc., 1968
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Encyclopaedia universalis : volume 1
Encyclopaedia Universalis France S.A. , 1989
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The New Encyclopaedia Britannica : index A-K
Encyclopaedia Britannica Inc., 2002
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The New Encyclopaedia Britannica : volume 2
Encyclopaedia Britannica Inc., 2003
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The New Encyclopaedia Britannica : volume 3
Encyclopaedia Britannica Inc., 2003
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