1988
Feasibility Study On Small-Farm Production Of Gums, Resins, Exudates And Other Non-Wood Products. Multipurpose Tree Species Network Research Series Paper No. 4. Morrillton, AR: Winrock International (Forestry/Fuelwood Research and DevelopmentProject - F/FRED). http://www.worldcat.org/oclc/24777719.
. 1988.