How many movies have Pendyala Nageswara Rao and Relangi Venkata Ramaiah collaborated on?

They have worked on 7 movies together! Their first movie together was Donga Ramudu (1955) while their highest rated movie together was Ramudu Bheemudu (1964). They have not worked together since Ramudu Bheemudu (1964). They are most known for their drama films together.