How many movies have Ivo Houf and Karel Jaromír Erben collaborated on?

They have worked on 3 movies together! Their first movie together was Tři zlaté vlasy děda Vševěda (1963) while their highest rated movie together was Princess Goldilocks (1973). They have not worked together since O ptáku Ohniváku (1980). They are most known for their fantasy films together.