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2. Axis of rotation metrology;Devitt;Power Transm Eng,2009
3. Engineering errors; subsection: axes of rotation errors;Slocum,2009
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5. B89.3.4 - 2010 Axes of Rotation: Methods for Specifying and Testing, New York, ASME, 2010. Order #: L06610 ISBN #: 9780791832110 http://catalog.asme.org/Codes/PrintBook/B8934_2010_Axes_Rotation.cfm