The New Encyclopaedia Britannica. - 15th ed. - Chicago : Encyclopaedia Britannica, 2007 - 32 v. : ill. (some col.), maps (some col.) ; 29 cm. ISBN: 9781593392925 (set) 1593392923 (set) Subjects--Topical Terms: Encyclopedias and dictionaries. Dewey Class. No.: 031 / E5649