1. Methods of fact finding;Brokensha,1983
2. The socio-economic forces on forests and required precautions of the forest;C̃akir;Turkish J. Forestry Engng,1988
3. Fuelwood: the energy crisis that won't go away;Ercholm,1982
4. Investigations of the Problem of Fuel and Especially Fuelwood in Turkey;Istanbullu,1978
5. Simple techniques for basic bio-fuels;Janczak;Unasylva,1981