@book{11253,
	author = {Hog-Angeloni, Cynthia and Others and Metzler, Wolfgang ; jt. ed. and Sieradski, Allan J. ; jt. ed.},
	title = {Two dimensional homotopy and combinatorial group theory},
	publisher = {Cambridge University Press},
	year = {1993},
	series = {London Mathematical Society lecture note series ; v.197},
	address = {Cambridge}
}