Environment, population and development / edited by Philip Sarre for an Open University course team. — London : Hodder & Stoughton ; the Open University, 1991. — CIDIMA. — 304 p. : il., gráf. ; 25 cm. — ( Environment) ISBN 0-340-53360-9 1. Desarrollo sostenible.2. Agricultura. I. Sarre, Philip, ed..