Portney, Leslie Gross. Foundations of clinical research: applications to practice/ by Leslie Gross Portney and Mary P. Watkins. - 2nd ed. - Upper Saddle River, New Jersey: Prentice Hall, 2000. - xiv, 768p.:bill. Includes bibliographical references and index. ISBN: 0838526950 Subjects--Topical Terms: Medicine --Research --Methodology. LC Class. No.: R 850 POR 2000