Text ( visual ) : unmediated A geometric investigation of reach / James Urey Korein. -- Cambridge, Mass. : MIT Press , c1985. -- 208 p. : ill. ; 24 cm. -- (ACM distinguished dissertations). -- Thesis (Ph. D.)--University of Pennsylvania, 1984 ; Bibliography: p. [196]-206 ; Includes index. -- ISBN 0262111047 ; (BA03850672) ; https://ci.nii.ac.jp/ncid/BA03850672 Author Heading(s): Korein, James Urey. -- Classification(s): LCC : TJ182 ; DC19 : 620.8/2. -- Subject Heading(s): LCSH : Links and link-motion ; LCSH : Machinery, Kinematics of ; LCSH : Robotics