TY  - BOOK
AU  - Polit,Denise F.
AU  - Hungler,Bernadette P.
TI  - Nursing research: principles and methods 
SN  - 0781715628
PY  - 1999///
CY  - Philadelphia
PB  - Lippincott
KW  - Nursing Research
KW  - methods
ER  -