000 00425nam a2200169Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a510
_bAm512(92)
100 _aBeem J K
245 _aDoubly timelike surfaces
260 _aN Y
_bAMS
_c1969
440 _aAmerican Mathematical Society: Memoirs; 92
650 _aMathematics
700 _aWoo P Y
_4Auth.
942 _cBK
999 _c65884
_d65884