Nursing research :principles and methods /
Polit, Denise F.
Nursing research :principles and methods / Denise F. Polit, Bernadette P. Hungler. - 2nd ed. - Philadelphia : Lippincott, c1983. - xx, 645 p. : ill. ; 25 cm.
Nursing research :principles and methods / Denise F. Polit, Bernadette P. Hungler. - 2nd ed. - Philadelphia : Lippincott, c1983. - xx, 645 p. : ill. ; 25 cm.