How many movies have Corrado Blengini and Osanna Guardini collaborated on?

They have worked on 4 movies together! Their first movie together was Shoot the Living and Pray for the Dead (1971) while their highest rated movie together was Who Killed the Prosecutor and Why? (1972). They have not worked together since Scusi, si potrebbe evitare il servizio militare?... No! (1974).