Ansel, Howard C. Pharmaceutical dosage forms and drug delivery systems / Howard C. Ansel, Nicholas G. Popovich, Loyd V. Allen, Jr. - 6th ed. - Baltimore, Md. : Williams and Wilkins, c1995. - xii, 514p. : ill. ; 25 cm. Includes bibliographical references and index. ISBN: Subjects--Topical Terms: Drugs--Dosage formsDrug delivery systems. LC Class. No.: RS200 / An8 1995