I am very interested in the historical development of statistical theories. Here is the research I've done: I've tried to read two old papers of Fisher. I think the first theory paper on MLE should be Fisher 1912.
Also, ThurstoneThurstone had some models to construct a probability mass function which is "equivalent" to a likelihood function, but from two old papers of him, I cannot confirm that he mentioned the maximum likelihood estimation. He implemented his idea but I don't know if he had done something similar to an MLE estimation of the parameterized function.
So my question is, what is the paper on implementing MLE in practice, especially the discrete data set? Who invented the probability mass function/likelihood function? Because Fisher invented MLE, do people usually attribute the invention of likelihood function to him?