In what year was the first international competitions held?

(a)  

In what year were the modern dimensions, size, and weight of the Volleyball approved?

(a)  

In what year was the International Volleyball Federation founded?

(a)  

In what year did the first men's championship take place in Prague?

(a)  

In what year Volley was included in the Olympic Games in Tokyo?

(a)  

What is the Volleyball's diameter?

(a)