1. Kay Shuttleworth J. , ‘Middle-Class Education: What Central and Local Bodies are Best Qualified to Take Charge of and Administer Existing Endowments for Education, and What Powers and Facilities should be given to Such Bodies?’, Transactions of the National Association for the Promotion of Social Science, 1866, p. 340.
2. A Tropp Cf. , The School Teachers, 1957, pp. 3 and 19
3. Musgrave P. W. , Sociology, History and Education, 1970, p. 197