Silverman, Richard A. Sequences and combinatorial problems / by S. I. Gelfand ... [et al.] - Rev. ed. - New York : Gordon and Breach, c1968 - vii, 85 p. : ill. ; 23 cm. - The pocket mathematical library: workbook 1 . ISBN: ? 23.00 Subjects--Topical Terms: Sequences (Mathematics)--Problems, exercises, etcCombinatorial analysis--Problems, exercises, etcInduction (Mathematics)--Problems, exercises, etc Dewey Class. No.: 512.5