Catalogued
Apportionment cartogram
- Made by
- US House apportionment publications
- Year
- 1911
- Field
- Thematic maps
- Kind
- Map
- Room
- Places — Placed by reading its description, not yet studied
33 other forms share this skeleton
Source
Friendly and Denis, Milestones in the history of data visualization
No direct source found yet
Attribution less certain: contested, or no single inventor recorded