1. Population estimates for the dunlin Calidris alpina derived from remotely sensed satellite imagery of the Flow Country of northern Scotland;Avery;Nature, Lond.,1990
2. Countryside Survey 1990 Main Report;Barr,1993
3. Heather in England and Wales;Bunce,1989
4. Integration of methods for detecting land use change, with special reference to Countryside Survey 1990;Bunce,1992
5. An integrated system of land classification;Bunce;Ann. Rep. Inst. Terrestr. Ecol.,1981