"1980: The lateen sail is triangular or a quadrilateral which is almost triangular, the former being the type used by the Byzantines. — Richard W. Unger, The Ship in the Medieval Economy 600-1600, page 47."
"1980: The lateen sail is triangular or a quadrilateral which is almost triangular, the former being the type used by the Byzantines. — Richard W. Unger, The Ship in the Medieval Economy 600-1600, page 47."