Article from the 90s about making radionovelas in the 1960s
There is an interesting chapter about radionovelas of Mexico in Serial Mexico: storytelling across media, from nationhood to now. Chapter 4 in particular is largely about Chucho el Roto
The adventures of the superhero Kalimán, who was created by Rafael Cutberto Navarro and Modesto Vázquez González in 1963.
More Kalimán episodes accessible through archive.org and sonodramas.org
Full episodes on youtube.