000 00291nam a2200109Ia 4500
005 20251007104223.0
008 251006s9999 xx 000 0 und d
245 0 _aScientific productity.Theeffectiveness of research...unesco
260 _aIST.ED | PARIS UNESCO
260 _c1979
942 _cBOK
999 _c2642
_d2642