?url_ver=Z39.88-2004&rft_id=10.4324%2F9781003049036-16&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Keely&rft.aulast=Harper-Hill&rft.au=Harper-Hill%2C+Keely&rft.date=2021&rft.title=Summary+and+propositions&rft.isbn=9780367501747&rft.genre=bookitem