Elkan, Walter. An introduction to development economics / Walter Elkan. - ELBS ed. - [Harmondsworth] : English Language Book Society and Penguin, 1979. - 157 p. - Penguin modern economics texts . ISBN: 0140711244 LCCN: 91026169 Subjects--Topical Terms: Economic development. Subjects--Geographic Terms: Developing countries--Economic conditions.