The World Book encyclopedia.
- Chicago, Illinois : World Book, (c)2009.
- 22 volume : illustrations (some color), color maps ; 26 cm.
"A 22-volume, highly illustrated, A-Z general encyclopedia for all ages, featuring sections on how to use World Book, other research aids, pronunciation key, a student guide to better writing, speaking, and research skills, and comprehensive index"--Provided by publisher.