Some characteristics of the migration of blacks in the United States.
D000293:Adolescent; D000328:Adult; D001741:Black or African American; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011158:Population Growth; D012111:Residence Characteristics; D012940:Social Problems; D012959:Socioeconomic Factors; D014171:Transients and Migrants; D014481:United States