Rao served as the executive director for the 1970 Kannada film , Samskara which won the National Film Award for Best Feature Film , and Bronze Leopard at the Locarno International Film Festival . He made his Telugu directorial debut with '' Neethi Nijayithi '' ( 1972 ) . He then directed social problem films like '' Dikkatra Parvathi '' ( 1974 ) , which won the National Film Award for Best Feature Film in Tamil , Filmfare Award for Best Film – Tamil for that year , and '' Tharam Marindhi '' , which won Nandi Award for Best Feature Film , both of which were premiered at International Film Festival of India and the Moscow Film Festival . The 1988 silent film , '' Pushpaka Vimana '' gained international acclaim , including 1988 Cannes Film Festival premiere in the International Critics ' Week . The film has received the National Film Award for Best Popular Film Providing Wholesome Entertainment , and Filmfare Award South for Best Film
1988 Cannes Film Festival
1988 Cannes Film Festival
Singeetam Srinivasa Rao