Polit, Denise F. Nursing research : principles and methods / Denise F. Polit, Bernadette P. Hungler. - 6th ed. - Philadelphia : Lippincott, c1999. - xviii, 757 p. : ill. (some col.) ; 25 cm. Includes bibliographical references and indexes. ISBN: 0781715628 (alk. paper) LCCN: 98039678 Subjects--Topical Terms: Nursing--Research--Methodology.Nursing Research--methods. LC Class. No.: RT81.5 / .P64 1999 Dewey Class. No.: 610.73/072 National Library of Medicine Call No.: WY 20.5 / P769n 1999