Корично изображение Електронна книга
Описание на библ. документ: "This study was supported by the Health Care Financing Administration, U.S. Department of Health and Human Services, under cooperative agreement no. 17-C-99170/3"--Title page verso.
Физически характеристики: 1 online resource (468 pages) : illustrations
Библиография: Includes bibliographical references and indexes.
ISBN: 0585339759
9780585339757