Catalogued
Zone curve
- Made by
- Karsten (naming); American statistical practice
- Year
- 1923
- Field
- Management and industry
- Kind
- Data display
- Room
- Change over time — Placed by reading its description, not yet studied
4 other forms share this skeleton
Source
Karsten 1923, Charts and Graphs, Figs.201-204
Attribution less certain: contested, or no single inventor recorded