I'm looking for data on the ancestors of John (Johann?) Fuchs and Augusta (Diering?) who were both born in Germany (Prussia?) and who bore Wilhelmina Fuchs in Pennsylvania in 1876 and Ernest Fuchs in 1878 and then moved to River Rouge in Michigan. I've searched censuses, but can't find anything about when they immigrated, when and where they got married or who their parents were. Any help would be appreciated including help on how to find immigration data.