Introduction to the vital statistics of the United States, 1900 to 1930Walter Francis Willcox · First published 1933Open the Tome
The need of social statistics as an aid to the courtsWalter Francis Willcox · First published 1913Open the Tome
Statistics of marriage and divorce in the United StatesWalter Francis Willcox · First published 1909Open the Tome
Area and population of the United States at the eleventh censusWalter Francis Willcox · First published 1897Open the Tome
