Perspectives on Neurophysiology and Neurogenic Speech and Language Disorders Brianne M. Bettcher,Virginia E. Sturm. Neuropsychological Assessment of Primary Progressive Aphasia (PPA). . 2014 Oct 1; 24(4):128-136. 2014 https://researcherprofiles.org/profile/79293028 Brianne M. Bettcher,Virginia E. Sturm