TY  - BOOK
AU  - Polit,Denise F.
AU  - Hungler,Bernadette P.,joint author
TI  - Nursing research: principles and methods 
SN  - 0397542208
PY  - 1978///
CY  - Philadelphia
PB  - Lippincott
KW  - Nursing
KW  - Research
N1  - Includes bibliographies and index; Open access
ER  -