Higgins, Philip J., 1926- Higgins, Philip J., 1926-
Notes on categories and groupoids
[by] Philip J. Higgins.
- London, New York, London, New York, Van Nostrand Reinhold [1971]
- Van Nostrand Reinhold mathematical studies, 32 .
On spine: Categories and groupoids. "These notes are based on lectures given at the University of Michigan in 1967."