Estimates of the population of the United States to October 1, 1980.
D000569:Americas; D003710:Demography; D019049:Developed Countries; D009656:North America; D011153:Population; D011156:Population Density; D011157:Population Dynamics; D014481:United States
Americas; Demographic Factors; Developed Countries; North America; Northern America; Population; Population Dynamics; Population Size--statistics; United States