000 00271nam a2200097Ia 4500
008 220204s9999 xx 000 0 und d
082 _aNR:62+678.7
_bNAT
245 0 _aNatural and synthetic rubber: Perspectives for the seventies
260 _aDelhi
_bESRF
_c1971
942 _cBK
999 _c21669
_d21669