I have a rather large bibliography file that I use for all of my work. I like to keep the file in alphabetical order within document categories (so all articles are alphabetically ordered, for instance). However, due to the size of the file, it’s starting to become a hassle inserting new entries into the correct place.
What I’d like to do is split this file into several distinct .bib files, each dedicated to a particular topic. I have seen that there are ways to do this with various style files on the Internet, but crucially, using these style files results in several distinct bibliographies being inserted into the document. That is, I haven’t found a way to create a single bibliography in a document, correctly ordered, from multiple .bib files.