Almost periodic functions; text tr. by Harvey Cohn; appendices tr. by F. Steinhardt. Fastperiodische Funktionen. English Bohr, Harald August, 1887-1951. Cohn, Harvey, tr. Almost periodic functions. QA403 .B62 517.5 BOA Bibliography: p. [114] New York, Chelsea Pub. Co., 1947. 1947. 1947 Text 113, [1] p. eng engger