Selected characteristics of persons in physical science: 1978.
D000367:Age Factors; D000569:Americas; D003710:Demography; D019049:Developed Countries; D004467:Economics; D004522:Educational Status; D004651:Employment; D005006:Ethnicity; D006280:Health Workforce; D007182:Income; D009656:North America; D009790:Occupations; D011153:Population; D011154:Population Characteristics; D012737:Sex Factors; D012922:Social Change; D011795:Surveys and Questionnaires; D014481:United States
Age Factors; Americas; Demographic Factors; Developed Countries; Economic Factors; Educational Status; Ethnic Groups; Human Resources; Income; North America; Northern America; Occupational Status; Occupations; Population; Population Characteristics--statistics; Questionnaires; Sex Factors; Social Change; United States