Three referees on roller skates officiating a game.
People in uniforms riding on a roller skates while playing their games
Men in hockey uniforms standing on the ice.
Three referees in roller skates are watching some people.
Referees wearing roller skates and helmets stand around a skating rink.
Mens with roller-skates on an ice rink, dressed in black and white stripes.
A ice skating ring with many in referee black and white shirts and helmets
The men in roller skates are in helmets.
An icy sports arena holds several men, wearing helmets, black pants, and black and white striped shirts, on roller skates, as well as numerous, casually-dressed non-participants on the edges.
Men are on roller skates wearing black and white uniforms and helmets are playing on the court