000 00295nam a2200097Ia 4500
008 120224s9999 xx 000 0 und d
082 _a514.24
_bGRA
100 _aGray, Brayton
245 _aHomotopy theory : an introduction to algebraic topology
260 _bAcademic Press
_aNew York
_c1975
999 _c141998
_d141998