TY  - BOOK
AU  - Wing,J.K.
AU  - Hafner,H.
TI  - Roots of evaluation: the epidemiological basis for planning psychiatric services : proceedings of the International Symposium held at Manheim 26-29 July 1972 
SN  - 0197213758
PY  - 1973///
CY  - London
PB  - Oxford University Press
ER  -