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Special Links:
www.cercor.oxfordjournals.org
Abacus and the Right Brain
www.morebrainexercise.com
www.bsrlm.org.uk
Experiment on The Combination of three Types of Arithmetic
Initial Research on Abacus Mental Arithmetic Education
Investigation Report on Tracing-back the Curriculum Reformation
Abacus Mental Arithmetic System
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