00328nam a2200097Ia 4500008004100000082002300041245009300064260002900157650002300186650002100209220204s9999    xx            000 0 und d  aNR:631.551979bRRM 0aRRIM training manual on tapping, tapping system and yield stimulation of Hevea June 1979  aKuala LumpurbRRIMc1979  aHevea exploitation  aHevea stimulants