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Contemporary Authors Online. The Gale Group, 2001
Contemporary Authors Online, Gale, 2003. Reproduced in Biography Resource Center. Farmington Hills, MI: The Gale Group. 2003. . Document Number: H1000047000.
H. M. Hoover. Authors and Artists for Young Adults, Volume 11. Gale Research, 1993.
Selected Books about H.M. Hoover
St. James Guide to Young Adult Writers, 2nd edition. Detroit, MI: St. James Press, 1999.
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