Scale 1:54,109,440. 1 in. = 854 miles. At equator ; Winkel tripel proj., central meridian 0° (W 180°E 180°/N 90°S 80°). Supplement to National Geographic, October 1998. - Maps on verso: Population and growth Fertility : smaller families Life expectancy : longer lives Urbanization : closer quarters World migration : distant homes. Includes text, statistical data, ancillary maps of Population density and Population and income, 3 other ancillary maps, and col. ill.