Advances in Non-Commutative Ring Theory: Proceedings of the Twelfth George H. Hudson Symposium, Held at Plattsburgh, U.S.A., April 23-25, 1981 Lecture Notes in Mathematics, nr. 951 Editat de P. J. Fleury sep 1982 Paperback Preț: 269.14 lei 6-8 săpt.