TY  - BOOK
AU  - Witts,L.J.
TI  - Medical surveys and clinical trials: some methods and applications of group research inn medicine
U1  - 619 
PY  - 1959///
CY  - London
PB  - Oxford University Press
KW  - Medicine
KW  - Research
KW  - Operations research
KW  - Group work in research
N1  - Includes bibliographical references and index
ER  -