Har Mandir Singh 'Hamraaz' and I are happy to report that the work on the Hindi Film Geet Kosh Volume 6 (1981-1985) in Hindi and English has been completed, for now.
It was originally published in 2018, so the main effort has been on converting the data in the printed book to a database.
The work on songs is in progress and will be reported when complete.
With this update the database has information
for 3,823 feature films, 1931-1940, 1951-1970, 1981-1985
The database website is
https://hindi-movies-songs.com/hfgk/index.php
Now You Know!