1. 关键资源 1994-03-15 This volume is the revised English translation of the German title, "Bodenfruchtbarkeit und Standortgerechte Landwirtschaft". It presents a range of practices conducive to sustainable agricultures, and is of particular importance for the development of smallholdings in the tropics. These include...
  2. 关键资源 1976-01-19 Volume 1 A guide to practical plans and books for village and small community technology. Critical reviews of selected publications on alternative sources of energy, farm implements, shop tools, agriculture, low-cost housing, health care, water supply, pedal power, philosophy of appropriate...