1. Social ethics Publication: [New York?] : [publisher not identified], [1886?] Subject(s): Marriage -- trendsSex Work
2. A study in vital statistics Author(s): Willcox, Walter F. (Walter Francis), 1861-1964, author Publication: [New York?] : [publisher not identified], [1893?] Subject(s): Divorce -- trendsMarriage -- trendsSocioeconomic FactorsUnited States
