http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v. 1. Containing the three unpleasant plays: Widowers' houses. The philanderer. Mrs. Warren's profession.--v. 2. Containing the four pleasant plays: Arms and the man. Candida. The man of destiny. You never can tell.