It's by Nino Rota, from the score to Fellini's movie Amarcord.http://www.amazon.com/Amarcord-Nino-Rota/dp/B00004TT4U
Such a great film. Caught it a few months ago in San Fran's Castro Theatre in a beautiful print! If anyone's ever in SF make sure to check out the Castro they do great film nights like Truffaut double features of 400 Blows and Jules and Jim. Plus I saw Milk there and it was weird watching the street (and theatre) I was on on a screen that was on the street...Borges style.