TY  - DATA
AU  - J. W. Gray
AU  -  S. MacLane
TI  - Reports of the Midwest Category Seminar V
T2  - Lecture Notes in Mathematics
SN  - 9783540365488
PY  - 1971///
CY  - Heidelberg
PB  - Springer Berlin
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0072304
ER  -