J. Howard Redfield anticipated many of the results in "Pólya enumeration" in his 1927 paper in the American Journal of Mathematics (https://doi.org/10.2307/2370675). But this work was largely forgotten until much later (the 1960s): see "The rediscovery of Redfield's papers" by Harary and Robinson (https://doi.org/10.1002/jgt.3190080202).