Collier's encyclopedia, with bibliography and index : volume 1
P.F. Collier & Son, 1954
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Collier's encyclopedia : volume 2
Macmillan Educational Company, 1990
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Collier's encyclopedia : volume 3
Macmillan Educational Company, 1990
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Collier's encyclopedia : volume 4
Macmillan Educational Company, 1990
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Collier's encyclopedia : volume 5
Macmillan Educational Company, 1990
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