Heidegger’s lecture “Einleitung in die Phänomenologie der Religion WS 1920/21” (which is published in GA 60) was attended by Fritz Kaufmann. His lecture notes (which are housed in the Husserl-Archives) are written in “Gabelsberger Stenographie”. The editors of GA 60 could not use Kaufmann’s notes because they are still not transcribed.
What follows is an example of Kaufmann’s notes and the reference to Heidegger’s lecture “Einleitung in die Phänomenologie der Religion WS 1920/21”.
(see Phaenomenologica 184: SYLVAIN CAMILLERI “PHÉNOMÉNOLOGIE DE LA RELIGION ET HERMÉNEUTIQUE THÉOLOGIQUE DANS LA PENSÉE DU JEUNE HEIDEGGER”)