TY  - JOUR
A1  - Beckmann, Jürgen
A1  - Kellmann, Michael
T1  - Procedures and principles of sportpsychological assessment
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Kellmann, Michael
A1  - Beckmann, Jürgen
T1  - Sport und Entspannungsverfahren
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Kellmann, Michael
A1  - Beckmann, Jürgen
T1  - Research and intervention in sport psychology : new perspectives for an inherent conflict
Y1  - 2003
ER  -