Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
E. William Chapin. Set-valued set theory. I. Notre Dame Journal of Formal Logic, 15(4):619-634, 1974. [doi]
Abstract is missing.