Casterline, John B. Unmet need for family planning in developing countries and implications for population policy / John B. Casterline & Steven W. Sinding - New York : Population Council , 2000 - 44p. : ill. ; 22 cm. - PC/PRD Working Paper No. 135 . Includes bibliographical references and index. Subjects--Topical Terms: Family planningPopulation policy Gov. Doc. Class. No.: US PC PRD WP-135