80 Stat. 378
80 Stat. 378; United States Statutes at Large, Volume 80, 89th Congress, 2nd Session; An Act to enact title 5, United States Code, ""Government Organization and Employees"" codifying the general and permanent laws relating to the organization of the Government of the United States and to its civilian officers and employees;
Public Law 89-554
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80 Stat. 378
U.S. Statutes at Large
PDF - https://www.govinfo.gov/link/statute/80/378?link-type=pdf
We also found 2 parallel citations:
HTML - https://www.govtrack.us/congress/bills/89/hr10104/text
H.R. 10104 (89th Congress)
U.S. Legislation
HTML - https://www.govtrack.us/congress/bills/89/hr10104/text
U.S. Government Publishing Office