000 00458 a2200145 4500
001 9720
010 _a907334638X
090 _a9720
100 _a20170516 frey50
101 _aeng
102 _aNL
200 _aA probleme Posing approach to teaching an initial particle model
_fby Maria johanna Vollebregt
210 _aUtrecht
_cCentre for science and Mathematics Education
_d1999
215 _a201p.
_d25cm.
225 _acdB series on research in science education
_v
099 _tTHE