?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Barnham%2C+Chris&rft.aufirst=Chris&rft.aulast=Barnham&rft.tpages=254&rft.title=Peirce%2C+Vygotsky+and+Concept+Formation&rft.degree=Doctoral&rft.date=28+November+2018&rft.inst=UCL+(University+College+London)