Proceedings of the American Mathematical Society Cover Image
  PROCEEDINGS of the AMERICAN MATHEMATICAL SOCIETY.  Providence,1(1950)- 
Proc.Amer.Math.Soc.
---> PG-3
  1(1950)-19(1968). 
lac. 1(1950) n.4; 13(1962) n.3; 18(1967) n.4; 19(1968) n.2
 
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