Text ( visual ) : unmediated Three pearls of number theory / by A. Y. Khinchin. -- Rochester, N. Y. : Graylock Press , 1952. -- 64 p. ; 22 cm. -- Translated from the second(1948), revised Russian edition by F. Bagemihl, H. Komm, W. Seidel. -- (BA08624863) ; https://ci.nii.ac.jp/ncid/BA08624863 Author Heading(s): Khinchin, Aleksandr I︠A︡kovlevich ; Bagemihl, F. ; Komm, Horace ; Seidel, W.