TY  - BOOK
AU  - Pocock,Stuart J.
TI  - Clinical trials: a practical approach 
SN  - 0-471-90155-5
AV  - R853 .C55 P62
PY  - 1983///
CY  - Chichester
PB  - John Wiley
N1  - Bibliografia: p. 248-256
ER  -