1. A new method for the representation of dispersed rural population;Barnes;Geogrl Rev,1940
2. The cost-effectiveness of terrain evaluation: Outline of project;Beckett;Report on Contract DAJA-37-71-C-0697 to European Research Office,1973
3. The cost-effectiveness of terrain evaluation: Evaluations at small map scale based on limited information;Beckett;Report on Contract DAJA-37-71-C-069 to European Research Office,1974
4. Route factors;Beckett;Traff Engng Control,1975
5. The cost-effectiveness of terrain evaluation: Final technical report;Beckett;Report on Contract DAJA-37-73-R-0029 to European Research Office,1975