TY  - BOOK
AU  - Hulley,Stephen B.,...[et al]
TI  - Designing Clinical Research
SN  - 9780781782104
PY  - 2007///
CY  - Philadelphia
PB  - Lippincott Williams & Wilkins, 
KW  - Epidemiologic Methods
KW  - Research Disigen
KW  - Epidemiology
KW  - research
KW  - methodology
N1  - Includes biliographical references and index
ER  -