TY  - BOOK
AU  - Denise F. Polit.
TI  - Nursing research: principles and methods
SN  - 71756634 Pbk. Np.
AV  - RT 81.5 P65 2003 CHS 
PY  - 2003///
CY  - Philadelphia: 
PB  - Lippincott Williams & Wilkins, 
KW  - Nursing-Research--Methodology.
ER  -