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.
Ieke Moerdijk. On the Freyd cover of a topos. Notre Dame Journal of Formal Logic, 24(4):517-526, 1983. [doi]
Abstract is missing.