000 00444nam a2200169Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a510
_bAm512
100 _aEberlein Patrick
245 _aSurfaces of nonpositive curvature
260 _aN Y
_bAMS
_c1979
440 _aAmerican Mathematical Society: Memoirs; 218
650 _aMathematics
650 _aNonpositive curvature
942 _cBK
999 _c2888
_d2888