Portney, Leslie Gross Foundations of clinical research : applications to practice / Leslie Gross Portney, Mary P. Watkins - 2nd ed. - Upper Saddle River : Prentice Hall , 2000 - 752 p. : ill. ; 24 cm. ISBN: 0838526950 RM209.04 LCCN: 99-055198 Subjects--Topical Terms: Research--Methods National Library of Medicine Call No.: W20.5