TY  - BOOK
AU  - Portney,Leslie Gross
AU  - Watkins,Mary P.
TI  - Foundations of clinical research: applications to practice 
SN  - 0838526950
PY  - 2000///
CY  - Upper Saddle River
PB  - Prentice Hall
KW  - Research
KW  - Methods
ER  -