Hoiberg, Dale H The new encyclopedia Britannica - Vol. 23: Macropedia - Knowledge in depth - 15th ed - Chicago HarperCollins 2007 - 928 p. 29 cm. 005213 X 191 ISBN: 2006921233 Subjects--Topical Terms: Encyclopedias and dictionaries. Dewey Class. No.: 301 / N532