Николай Леонидович Слонимский

Nicolas Slonimsky, born Nikolai Leonidovich Slonimskiy, was a Russian-American musicologist, conductor, pianist, lexicographer, and composer. Best known for his writing and musical reference work, he wrote the Thesaurus of Scales and Melodic Patterns and the Lexicon of Musical Invective, and edited Baker's Biographical Dictionary of Musicians.