000			00378nam a2200145 a 4500
005			20240602103921.0
008			040318s19uu xx 00 eng d
020			_a9231016660
100			_aUnesco.
245			_aUnesco handbook for science teachers.
260			_aParis : _bUnesco, _cc1980.
300			_a199 p. : ill.
650			_aScience _xStudy and teaching.
942			_2ddc
999			_c82755 _d82755