Gray, John W. ( John Walker ) ,1931- Formal category theory: adjointness for 2 - categories [by] John W. Gray - Springer-Verlag Berlin 1974 1974 - xii, 282 p.25 cm. - Lecture notes in mathematics 391 . Bibliography: p. 280-282. ISBN: 0387068309 Subjects--Topical Terms: Categories (Mathematics)--QA LC Class. No.: QA169.G739