Before the school was known as Univ. of Louisiana-Monroe it was called Northeastern Louisiana State.
The Northeastern State yearbook has online offerings which include a small selection of years: 1954 and then 1958 through 1977.
There is not much going on in those yearbooks in terms of chronicling football. I turned up a photo of Northeastern Louisiana State playing intercollegiate football, but overall this collection is a limited project of under 20 yearbooks with sparse sports coverage and did I mention it's hosted in Issuu?
Take a look at the Northeastern Louisiana State Chacahoula for a trip back to a time that football has forgotten.