Casley, D. J. Data collection in developing countries / D. J. Casley and D. A. Lury. - Oxford :;New York : Clarendon Press ;;Oxford University Press, 1981 - xi, 244 p. 24 cm. Includes bibliographical references and index. ISBN: 0198771231 :;019877124X (pbk.) Subjects--Topical Terms: Sampling (Statistics) Universal Decimal Class. No.: 309.0723