MUSIC "The echo";double staff for piano with music;text and indication of the fingering. On the sidelines;Isabella-silly and the black cat full of wonder for the acoustic phenomenon. From "Giro;round trip ";didactic scores of popular songs for children collected and adapted by Luigi Malatesta (1899-1981);illustrated by Nisa (Nicola Salerno;March 11; 1910 - May 22; 1969). Suvini-Zerboni editions;Milan 1945