Bibliography (15):

1. https://archive.org/details/filmdailyyearboo00film/page/512

2. The Death of a Technical Skill

3. The Dynamo and the Computer: A Historical Perspective on the Modern Productivity Paradox

4. Computing Productivity: Firm-Level Evidence

5. Wikipedia Bibliography:

   1. https://en.wikipedia.org/wiki/Benshi

      https://en.wikipedia.org/wiki/Benshi

   2. Singin' in the Rain

   3. Sunset Boulevard (film)

   4. https://en.wikipedia.org/wiki/Sound_film

      https://en.wikipedia.org/wiki/Sound_film

   5. https://en.wikipedia.org/wiki/Sound_film#Triumph_of_the_%22talkies%22

      https://en.wikipedia.org/wiki/Sound_film#Triumph_of_the_%22talkies%22

   6. https://en.wikipedia.org/wiki/Survival_analysis#Hazard_function_and_cumulative_hazard_function

      https://en.wikipedia.org/wiki/Survival_analysis#Hazard_function_and_cumulative_hazard_function

   7. IMDb

   8. https://en.wikipedia.org/wiki/The_Jazz_Singer

      https://en.wikipedia.org/wiki/The_Jazz_Singer

   9. https://en.wikipedia.org/wiki/Jack_L._Warner

      https://en.wikipedia.org/wiki/Jack_L._Warner

   10. https://en.wikipedia.org/wiki/Adolph_Zukor

       https://en.wikipedia.org/wiki/Adolph_Zukor

   11. https://en.wikipedia.org/wiki/Paramount_Pictures

       https://en.wikipedia.org/wiki/Paramount_Pictures