1. 01/01/1956 Pode ser feito cimento de borracha barato facilmente com gasolina ordinária e cru borracha de folha.
  2. This report examines the state of knowledge and the future promise of guayule Parthenium argentatum Gray, a little-know shrub native to the desert of southwest Texas and nothern Mexico that was a commercial source of natural rubber during the first half of this century.
  3. Key Resource 01/01/2000 This book covers all practical aspects of growing rubber.