SOURCE
CIA World Factbooks 18 December 2003 to 28 March 2011
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 1 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 1 million population.
SOURCE: CIA World Factbooks 18 December 2003 to 28 March 2011 via NationMaster
