TY  - BOOK
AU  - Medical survey and clinical Trials
AU  - C.B.E. L.J. Witts
TI  - Medical survey and clinical Trials: Some Methods and Application of Group Research in Medicine
AV  - MED 852 W5
PY  - 1959///
CY  - New York
PB  - oxford university Press
KW  - Medical Research
ER  -