TY  - BOOK
AU  - Witts, L J
TI  - Medical surveys and clinical trials: some methods and applications of group research in medicine
AV  - HH3 EU 
PY  - 1959///
CY  - London
PB  - Oxford University Press
KW  - Medical Surveys
KW  - Medical Research
N1  - Includes bibliographical references and index
ER  -