https://en.wikipedia.org/wiki/Halim_El-Dabh
Fact Mag - Pierre Schaeffer Guide
Groupe de Recherche de Musique Concrète
https://stockhausenspace.blogspot.com/2014/12/opus-3-studie-i-studie-ii-and-etude.html
Ussachevsky & Luening
Hugh Le Caine
Click to access Hugh_Le_Caine.pdf
Le Caine's Special Purpose Tape Recorder
Later Influences
Several Species of Small Fury Animals Gathered Together in a Cave and Grooving with a Pict
And then there is this gem: