If you'd like a much less easy to read bit of reference material, schema has an official designation for colleges/universities though I haven't ever done any work with one before, and don't know how I'd go about trying to designate different campus locations... aside from the obvious of having the main address be the address in the schema everywhere aside from the pages specifically about a sub location, and then using the relevant address/etc. there instead. If you're hoping to have multiplate addresses show up in the knowledge panel or something, I'd look around to see if you can find any colleges/universities with multiple locations and see what they're doing.
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