?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Campbell%2C+Hugh&rft.aulast=Campbell&rft.aufirst=Hugh&rft.tpages=866&rft.title=A+critical+review+of+some+concepts+of+freedom+in+education+in+England+from+1900+to+1944&rft.degree=Doctoral&rft.date=1956&rft.inst=Institute+of+Education%2C+University+of+London