@chpietsch @Ruth_Mottram @SteveBHolt Yes,
@base deserves more attention, IA Scholarly as well. Another one I'd throw in:
@OpenAlex. Have a look at their surprisingly good and complete journal metadata from a plethora of sources, matching of authors as well as institutions names, citation graph, and on top of that, all metadata is free (CC0, the real deal), and access via API ist possible.