TY  - JOUR
A1  - Schröder, Eberhard
A1  - Edelstein, Wolfgang
T1  - Full house or Pandora's box? : the treatment of variability in post-Piagetian research
Y1  - 2000
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/19280
ER  -