"Population." . . "Sociology." . . "Economics." . . . . "Growth(general)" . . "Puerto Rico" . . "Sociology and Law." . . "RAND CORP SANTA MONICA CALIF." . . . . . . . . . "Love and Life between the Censuses"@en . . . . . . . . . . . . . . . . . . . "Love and life between the censuses" . "Love and life between the censuses"@en . . . . .