Leo Riemens

Leonardus Antony Marinus Riemens (3 December 1910 – 3 April 1985) was a Dutch musicologist and cultural journalist. He wrote a book about Maria Callas, and together with Karl-Josef Kutsch began a reference book about opera singers in 1962, which grew to ''Großes Sängerlexikon'', the standard reference in the field. Provided by Wikipedia