Where Can I Find The Acts Of Congress For Older Coins?

I find most of these on Wikipedia, but remember that not all of them required an Act of Congress. For example, for the Roosevelt dime (per https://en.wikipedia.org/wiki/Roosevelt_dime): "As the Mercury design, first coined in 1916, had been struck for at least 25 years, it could be changed under the law by the Bureau of the Mint. No congressional action was required, though the committees of each house with jurisdiction over the coinage were informed."

I have been reviewing the historical documents on https://www.usmint.gov/learn/histor...al-documents. I have not found any mention for the authorization for the 1909 Lincoln one-cent (for example).

My word searches at https://nnp.wustl.edu/ are also not effective. Congress, or a committee of congress, has to authorize coinage and the design. The older coins are proving to be very difficult to find. To my surprise, I have not found any discussion on the 1776-1976 bicentennial coins design, much less the authorization of the new design. Articles that are talking about a new design that has already been approved is not adequate.

I am now reviewing the acts of congress in the archives at https://www.loc.gov/law/help/statut...ongress.php. So far, I still have not found anything.

Any help would be appreciated. Many thanks.

S. 1141, 93rd Congress.