Text ( visual ) : unmediated The mathematical theory of relativity / by A.S. Eddington. -- Digitally printed version. -- : pbk. -- Cambridge [England] : Cambridge University Press , 2007. -- ix, 270 p. ; 22 cm. -- Originally published: 2nd ed. 1924, reprinted 1963 ; Re-issued in this digitally printed version 2007 ; Includes bibliographical references (p. [264]-266) and index. -- ISBN 9780521091657 ; (BB14821640) ; https://ci.nii.ac.jp/ncid/BB14821640 Author Heading(s): Eddington, Arthur Stanley, Sir. -- Subject Heading(s): LCSH : Relativity (Physics)