Text in periodical
«Video tape roundup». – Radical Software. – Vol. 2, no. 4 ([1973]). – P. 60-65.
Also available on the Internet. {{www.radicalsoftware.org}}
Text in periodical
«Spare reel directory». – Radical Software. – Vol. 2, no. 5 ([1973]). – P. 52-56.
Also available on the Internet. {{www.radicalsoftware.org}}