Preludes, Opus 28 : An Authoritative Score Historical Background : Analysis, Views and Comments. - New York : W.W. Norton & Company, 1973. - 101 p. ; 21 cm. - Norton critical scores . ISBN: 0-393-02161-0 LCCN: 3534 Subjects--Topical Terms: Cánones, Fugas, etc.---Estudio y enseñanza. Universal Decimal Class. No.: 78.083.22(02)