Scale 1:30,000,000 (W 180⁰--E 180⁰/N 90⁰--S 55⁰). Scale 1:90,000,000 (W 180⁰--E 180⁰/N 90⁰--S 90⁰).
Note
Alternate title: World distribution of plague. To accompany: Geographical review, vol. 42, no. 4, 1952. Includes text and chart of "Résumé of natural history."