000 00297nam a2200109Ia 4500
001 21382
008 170722s9999 xx 000 0 und d
245 _aFundamental concepts in technologyI
_bEnery.Block2.Unit4. /
260 _bOpen University Press ,
_c1975.
300 _a78 p.
_c29cms
942 _cGEN
999 _c94910
_d94910