1. 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.
  2. Recurso clave 1/1/2000 This book covers all practical aspects of growing rubber.
  3. 1/1/1956 El cemento de caucho barato puede hacerse fácilmente con la gasolina ordinaria y crudo el caucho en placas.