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Baum(bôm, bäm), Lyman Frank 1856-1919.
American writer known especially for The Wonderful Wizard of Oz (1900) and 13 other Oz stories, including Ozma of Oz (1907).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biography) L(yman) Frank. 1856–1919, US novelist, author of The Wonderful Wizard of Oz (1900) and its sequels
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
L(yman) Frank, 1856–1919, U.S. author.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.