1
by Bortz, Jürgen, Lienert, Gustav A.
Published 2008
Springer Berlin Heidelberg
Subjects: '; ...PsychologyMethodology...

2
by Bortz, Jürgen, Lienert, Gustav A., Boehnke, Klaus
Published 2008
Springer Berlin Heidelberg
Subjects: '; ...PsychologyMethodology...