On the roots of a polynomial and its derivative. Offprint
1948. Offprint from Bulletin of the American Mathematical Society 54. 184-190pp. Original printed wrappers. Fine. More
1948. Offprint from Bulletin of the American Mathematical Society 54. 184-190pp. Original printed wrappers. Fine. More
1946. Offprint from American Mathematical Monthly 53. 314-317pp. Original printed wrappers, slightly sunned. VG+. More