How many movies have Lucille Bliss and William Hanna collaborated on?

They have worked on 3 movies together! Their first movie together was Oliver and the Artful Dodger (1972) while their highest rated movie together was The Flintstones: Little Big League (1978). They have not worked together since The Flintstones: Little Big League (1978). They are most known for their tv movie films together.