Comments: Light rubbing wear to cover, spine and page edges. Very minimal writing or notations in margins not affecting the text. Possible clean ex-library copy, with their stickers and or stamp(s).
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Publisher: Facts On File, Incorporated
Thorpy, Michael, Yager, Jan
Praise for the previous edition: ...readable, well designed, and informative. -- School Library Journal Millions of people have experienced sleep-related concernsThorpy, Michael is the author of 'Encyclopedia of Sleep and Sleep Disorders' with ISBN 9780816018703 and ISBN 0816018707.