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Spreen, Otfried; Strauss, Esther; Elisabeth M. S. Sherman (2006). A compendium of neuropsychological tests: administration, norms, and commentary. Oxford [Oxfordshire]: Oxford University Press. pp. 477–499. ISBN0-19-515957-8. http://books.google.com/?id=dvE1mzbqI14C&pg=PA477&lpg. Retrieved 2009-03-06.
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psychclassics.yorku.ca
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