Boas, R. P., Jr Quasi-positive sequences and trigonometric series by R. P. Boas, Jr - Evanston, Illinois Northwestern University [s. a.] - 12 p 30 cm Contine bibliogr. - Lucrare multigr Subjects--Topical Terms: Teoria functiilorSerii trigonometrice Dewey Class. No.: 517.518.4