1. Simple guidelines for the improvement of smallholders copra drying;Bulder;FAO Technical Working Party on Coconut Production and Processing,1969
2. Design and development of a low cost solar crop, rice, tobacco, corn, mungbean, coconut, sorghum, peanuts and coffee dryer in the Philippines;Mendoza,1979
3. Design and development of solar copra dryers;Patil;Agricultural Mechanization in Asia, Africa and Latin America,1984
4. Hermansyah and Baryono Hardjosuwito, Petunjuk cara pembuatan alat pengering kopi dan cokelat rancangan BPP Bogor;Alam;Booklet of the Research Institute for Estate Crops,1986
5. Sun-drying of coffee under different waterproof covering materials;Kamau;Kenya Coffee,1982