@phdthesis{discovery10019344,
          school = {Institute of Education, University of London},
            year = {1966},
           title = {A study of linguistic differences in samples of the speech and writing of groups of working-class and middle-class boys aged twelve and fifteen},
            note = {Thesis: (PhD) University of London Institute of Education, 1966.},
          author = {Lawton, Denis},
             url = {https://discovery.ucl.ac.uk/id/eprint/10019344/}
}