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A. M. (Alexander M. ) Chisholm

  • Key to Chisholm's Mathematical Mechanical Scale [microform] : An Instrument for Solving All Problems in Arithemetic, Geometry, and Trigonometry, Right-Angled and Oblique, Plane and SphericalKey to Chisholm's Mathematical Mechanical Scale [microform] : An Instrument for Solving All Problems in Arithemetic, Geometry, and Trigonometry, Right-Angled and Oblique, Plane and Spherical