000 00291nam a2200121Ia 4500
001 87299
008 170722s9999 xx 000 0 und d
100 _aOpen University Course Team
245 _aIntroduction /
260 _bOpen University Press
_c1974
300 _a47
_c29 cm.
942 _cGEN
999 _c8958
_d8958