TY  - BOOK
AU  - Polit,Denise F.
AU  - Beck,Cheryl Tatano
TI  - Nursing research : principles and methods
SN  - 0781737338
PY  - 2003///
CY  - Philadelphia
PB  - Lippincott Williams & Wilkins
KW  - Nursing research
KW  - methods
ER  -