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  1. 1

    Posture sitting, standing, chair design and exercise Por Zacharkow, Dennis

    Publicado em 1988
    Livro

    Posture sitting, standing, chair design and exercise
  2. 2

    The healthy lower back laying the foundation through proper lifting, sitting, and exercise Por Zacharkow, Dennis

    Publicado em 1984
    Livro

    The healthy lower back laying the foundation through proper lifting, sitting, and exercise

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