Jack S. Levy. “Necessary Conditions in Case Studies: Preferences, Constraints, and Choices in July 1914.” Necessary Conditions: Theory, Methodology, and Applications, ed. Gary Goertz and Harvey Starr (Rowman & Littlefield, 2003).

“Necessary Conditions in Case Studies: Preferences, Constraints, and Choices in July 1914.” Necessary Conditions: Theory, Methodology, and Applications, ed. Gary Goertz and Harvey Starr (Rowman & Littlefield, 2003).