In 1976 , the UAI included 31 member countries and the number of its projects had risen to 32 .
In 1969 , the 50th anniversary of the UAI was celebrated : a ceremony was held under the cupola of the prestigious Institut de France in Paris .
In 1976 , the UAI included 31 member countries and the number of UAI 's projects had risen to 32 .
In 1969 , the 50th anniversary of the UAI was celebrated : a ceremony was held under the cupola of the prestigious Institut de France in Paris .