By van Niekerk Jan   in Journal of Mental Health

ISSN:1360-0567|15|5|613-614

Informa Healthcare‎(2006)‎

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By Niekerk Jan   Calitz Frikkie   Halleen Francois   Fourie Paul   in European Journal of Plant Pathology

ISSN:0929-1873|127|3|375-390

Springer Publishing Company ‎(2010)‎

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By van Niekerk Jan K.   Nielsen Tom A.   Pasu Saruban   Shore Sarah   Huppert Felicia A.   in Aging, Neuropsychology, and Cognition (Neuropsychology, Development and Cogniti

ISSN:1382-5585|11|4|416-427

Routledge Ltd‎(2004)‎

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