Tools for progress : guide to equipment and materials for small-scale development available in the United Kingdom. - London : Intermediate Technology Development Group (ITDG) , - 192p. : ill. ; 29 cm. - 1967/68 . Includes bibliographical references and index. Subjects--Topical Terms: EquipmentCataloguesFarm equipmentMachinery Dewey Class. No.: 621.903 / INT