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Number of items: 2.
Gantert, Ann Xavier . (2007). INTEGRATED ALGEBRA. Amsco School Publications, Inc., America. ISBN 978-1-56765-584-1
Boju Valentin and Funar Louis . (2007). The Math Problems Notebook. Birkh¨auser Boston, c/o Springer Science+Business Media LLC, 233 Spring Street, New York, NY 10013, USA, U.S.A. ISBN 978-0-8176-4546-5