00427nam a2200121Ia 4500008004100000100001600041245010600057245005600163260000900219300002500228440003800253650001400291171207s9999    xx            000 0 und d  aHarlow, Ann  aThreshold concept theory as an enabling constraint: a facilitated practitioner action research study   cAnn Harlow, Bronwen Cowie, David McKie & Mira Peter  c2017  apages 438-452,  2017  aEducational Action Researchv25:3  aEDUCATION