REMOVE

1. green
2. red
3. diagrams
4. 1975-06
5. 1946

WHAT

1. drawing (image-making) (1)
2. graphite pencils (1)
3. ink (1)
4. lines (geometric concept) (1)
5. sketches (1)
6. teaching (1)
7. trees (1)
8. Visual Works (hierarchy n … (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1933 (1)
2. 1933-1941 (1)
3. 1941 (1)