00344nam a2200133Ia 4500003000400000008004100004020002200045040000800067100001800075245006100093260002900154300001500183365001200198LDD181029s9999    xx            000 0 und d  a735402000cE96.95  cLDD  aMarx, Jeffrey 0a2003 physics education research conferencecJeffrey Marx  aNew YorkbMelvillec2004  axiv, 194p.  bE 96.95