1. The Countryside: Planning and Change;Blacksell,1981
2. Factors and forces affecting the optimum future rural settlement pattern in the United States;Clawson;Economic Geography,1966
3. In defense of key settlement policies;Cloke;The Village,1977
4. The Use of Key Settlement Policies in the Planning of Rural Areas;Cloke,1977
5. Key Settlements in Rural Areas;Cloke,1979