  Survey Research in Underdeveloped Countries [Concepts and techniques in modern geography] (Paperback) ISBN-13: 9780860941354 ISBN-10: 0860941353 ?  Sampling Methods for Geographical Research [Concepts and techniques in modern geography ; no. 17] (Paperback) ISBN-13: 9780902246966 ISBN-10: 0902246968 ? Questionnaires and Interviews in Geographical Research [Concepts and techniques in modern geography ; 18] (Paperback) |
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