Completed the following sentence: Awarded the International Arbiter title, he was a Head Referee in the
23rd Chess Olympiad, and in the 8th Women's Chess Olympiad, both at Buenos Aires 1978. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️