I would recommend the Informal Introduction to Algol 68, available in PDF at https://algol68-lang.org/resources
You can find some modern Algol 68 code, using the modern stropping which is the default in GCC, at https://git.sr.ht/~jemarch/godcc Godcc is a command-line interface for Compiler Explorer written in Algol 68.
I would recommend the Informal Introduction to Algol 68, available in PDF at https://algol68-lang.org/resources
You can find some modern Algol 68 code, using the modern stropping which is the default in GCC, at https://git.sr.ht/~jemarch/godcc Godcc is a command-line interface for Compiler Explorer written in Algol 68.