Text ( visual ) : unmediated Elie Cartan-Albert Einstein : letters on absolute parallelism, 1929-1932 / original text, English translation by Jules Leroy and Jim Ritter ; edited by Robert Debever. -- : [pbk.]. -- [Princeton] : Princeton University Press , [20--]. -- xvii, 233 p. ; 24 cm. -- (Princeton legacy library). -- Reprint. Originally published: Princeton : Princeton University Press, 1979 ; Bibliography: p. 232-233. -- ISBN 9780691608044 ; (BB18898374) ; https://ci.nii.ac.jp/ncid/BB18898374 Other Title(s): Letters on absolute parallelism 1929-1932 ; Elie Cartan and Albert Einstein ; Elie Cartan and Albert Einstein : letters on absolute parallelism, 1929-1932. -- Author Heading(s): Cartan, Elie ; Einstein, Albert ; Debever, Robert. -- Classification(s): LCC : QC15 ; DC : 530.1/42. -- Subject Heading(s): LCSH : Physicists -- Correspondence ; LCSH : Cartan, Elie, 1869-1951 ; LCSH : Einstein, Albert, 1879-1955 ; LCSH : Unified field theories