TY  - CHAP
A1  - Wight, D.
A1  - Obasi, A.
T1  - Unpacking the black box: the importance of process data to explain outcomes
Y1  - 2003
A3  - Stephenson, J.
A3  - Imrie, J.
A3  - Bonell, C.
T2  - Effective sexual health interventions: Issues in experimental evaluation
CY  - Oxford
PB  - Oxford University Press

ER  -