000			00363nam a2200145Ia 4500
008			160615s9999 xx 000 0 und d
100			_aNABER(Gregory)
245			_aSpacetime and singularities: an introduction
260			_bCambridge University Press
260			_c1988
300			_aix p. + 180
942			_cBooks
999			_c17983 _d17983