Stockhausen Verlag Tekte 13 (2CD)

4 KRITERIEN DER ELEKTRONISCHE MUSIK (1963)
Lecture spoken in German illustrated with  four musical examples from:

Kontakte (four short excerpts only)  

 work number 12 1960
stereo realization of 4 track electronic tape

also released on

 DG LP 16 133(LP)

Ex Libris XL171686 (LP)

Deutsche Grammophon DGC 8811 (USA Reel-to-Reel 7 1/2 IPS tape)

DG 2538 152 (excerpt) (LP)

Polydor 2612 023 (excerpt) (2LP)

Stockhausen Complete Edition 3 (CD)