REMOVE

1. Topography
2. Statistical
3. Diagram
4. Data Visualization

WHAT

1. Historical (2)
2. Pictorial map (2)
3. Political (2)

WHERE

1. World (2)
2. Belgium (1)
3. Korea (1)

WHO

1. Denoyer-Geppert Company (2)
2. News Map of the Week, Inc … (2)

WHEN

1. 1949 (1)
2. 1950 (1)
3. Korean War (1)