TY  - BOOK
AU  - Polit, Denise F.
AU  - 
AU  - Beck, Cheryl T.
TI  - Nursing research: principles and methods
SN  - 0-7817-5663-4
U1  - 610.73072 P759 2004 
CY  - Philadelphia
PB  - Lippincott Williams & Wilkins.
KW  - Nursing--Research--Methodology
ER  -