Where can I find the original/historical 47 C.F.R. § 73.34, 73.240 and 73.636? To clarify, I'm looking at wikipedia: Cross ownership rules of 1975, but cannot find the primary source: Amendment of §§73.34, 73.240 and 73.636 of the Commission's Rules Relating to Multiple Ownership of Standard, FM and Television Broadcast Stations, 50 F.C.C. 2d 1046 (1975).
law-cornell:47-cfr-73 is blank for each entry:
The sections were amended/superseded at some point before the Telecommunications Act of 1996. I've found mention to neighboring sections which were amended, for instance tel-com-act-1996-text on fcc.gov comes up with references to 47 C.F.R. § 73.3555 which seems relevant, but is not what I was looking for.
I found an incomplete 1975 memorandum opinion & order on fcc.gov: in the Matter of Revision of rules permitting multiple ownership of non-commercial educational radio and television stations in single markets.... The document closely matches my subject, although the pdf ends after the opinion, without giving the order itself. Interestingly, the pdf opinion mentions section 73.35(not 73.34), although 73.240 or 73.636 are the same.
What happened to these documents? Where do I find them?