SOURCE
All
CIA World Factbooks 18 December 2003 to 18 December 2008
DEFINITION
Total number of
airports with useable unpaved runways (grass, dirt, sand, or gravel surfaces), categorised according to the length of the longest runway Per capita figures expressed per million population
DEFINITION: Total number of
airports with useable unpaved runways (grass, dirt, sand, or gravel surfaces), categorised according to the length of the longest runway Per capita figures expressed per million population
SOURCE: All
CIA World Factbooks 18 December 2003 to 18 December 2008