1. 06-01-1979 This contains information on post-harvest crop processing machines for developing areas of the world. 122 pages, illustrations, photos
  2. 01-01-1981 Tropical Products Institute, Rural Technology Guide 11 26 pages, illustrated, photos
  3. The purpose of this publication is to spread the knowledge of better tools and to provided farm implement experts, agricultural leaders and techniques with information on the principles governing the design of small tools and their use.