@phdthesis{discovery10020064, school = {Institute of Education, University of London}, note = {Thesis: PHD University of London Institute of Education, 1978.}, title = {An Exploration of Case Study Methods in Evaluating Secondary Schools.}, year = {1978}, url = {https://discovery.ucl.ac.uk/id/eprint/10020064/}, author = {Warren, E. E.} }