@book{15668,
	author = {Pitt, D. H. and Summer Conference on Calegory Theory and Computer Science},
	title = {Category theory and computer science :},
	publisher = {Springer,},
	year = {1991},
	address = {Berlin :},
	note = {Presented at the fourth biennial Summer Conference on Category Theory and Computer Science, held in Paris, September 3-6, 1991}
}