TY - BOOK AU - Polit,Denise F. AU - Beck,Cheryl Tatano TI - Essentials of nursing research : methods, appraisal, and utilization SN - 0781749727 AV - RT81.5 .P63 2001 PY - 2006/// CY - Philadelphia PB - Lippincott Williams & Wilkins KW - Nursing KW - Research KW - Nursing Research N1 - Includes bibliographical references and index ER -