: Balan (1938) marked the transition to sound, though early films remained heavily influenced by Tamil and theatre-style aesthetics.
: In the 1950s, films like Neelakkuyil (1954) were instrumental in forming a unified Malayali identity by incorporating regional dialects, slang, and communal idioms. : Balan (1938) marked the transition to sound,
A Social History of Malayalam cinema from its origins to 1990. - IJHSSI : Balan (1938) marked the transition to sound,