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  1. Wirtz, Robert W.

    Nonverbal instruction

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    National Council of Teachers of Mathematics, 1963

    Published in: The Arithmetic Teacher

  2. WIRTZ, ROBERT W.

    Nonverbal instruction

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    The National Council of Teachers of Mathematics, 1963

    Published in: The Arithmetic Teacher

  3. Wirtz, Victoria; L’Italien, Gilbert; Berman, Robert; Beiner, Melissa

    Results from the Long-Term Open Label Extension Phase Analyses of BHV4157-201: A Phase IIb/III, Randomized, Double-blind, Placebo-controlled Trial of the Safety and Efficacy of Troriluzole in Adult Subjects with Spinocerebellar Ataxia (5308)

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    Ovid Technologies (Wolters Kluwer Health), 2020

    Published in: Neurology

  4. Wirtz, Jochen; Johnston, Robert; Khoe Sin Seow, Christopher

    Guest editorial

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    Emerald, 2009

    Published in: Journal of Service Management