A "fun" bibliographical data modelling problem that I am running into: Odo Reuter published his "Hemiptera Gymnocerata Europae" in five volumes from 1878 to 1896. Vol. 3 includes supplements for vols. 1-3 and vol. 4 and 5 include their own supplement (it seems). None of the volumes have their own title.
The whole thing was then reprinted in parts in Acta Soc. scient. Fenn.: vols. 1-3 with their supplements in vol. 13 (1884), and the rest in vol. 23 (1897).











