From the GPO:
The U.S. Government Publishing Office (GPO) and the National Archives’ Office of the Federal Register (OFR) digitally release historic issues of the Federal Register from 1970-1979. The complete collection of issues of the Federal Register from 1970 to present is now available digitally on GPO’s govinfo.
This project is digitizing a total of 14,587 individual issues, dating back to the first Federal Register in 1936. Nearly two million pages are being digitized.
The 1970s era of the Federal Register covers the Administrations of Presidents Richard Nixon, Gerald Ford, and Jimmy Carter, and includes such highlights as:
Pardon of President Richard Nixon by President Gerald Ford: September 10, 1974
Embargo by the Postmaster General on acceptance of mail of all classes destined for New York City and outlying areas due to a work stoppage at the Post Office Department: March 21, 1970
A final rule to establish the quantity of California-Arizona lemons that can be sent to market from April 8-14, 1979, due to marketing situation in the lemon industry: April 6, 1979
See Also: Direct to Federal Register