REMOVE

1. Conservatories
2. Geodesic domes

WHAT

1. Architecture -- 1900-2000 (2)
2. Architecture -- Canada (2)
3. Circular buildings (2)
4. Exhibitions -- Buildings, … (2)

WHERE

1. CANADA (2)
2. Montréal, Quebec (2)

WHO

1. FULLER, R. Buckminster (2)

WHEN

1. 1967 (2)