TY  - RPRT
TI  - Service and values.
AU  - W Hetznecker
AU  - M A Forman
PY  - 1973
DO  - 10.1080/00332747.1973.11023765
UR  - https://pubmed.ncbi.nlm.nih.gov/4743232/
ID  - 4743232
ER  -