1. Sulfur in plant materials by digestion with nitric and perchloric acid;Blanchar,1965
2. Cassava production systems;CIAT,1975
3. Fertilizer Guide for the Tropics and Subtropics;De Geus,1973
4. Mineral nutrition of cassava and adaptation to low fertility conditions;Edwards,1976
5. Augmented (or Hoonuiaku) Designs;Federer;Hawaiian Plant. Rec.,1956