The University of Kent Libraries may not hold all the material you need, especially if you are engaged in a research project.
Search the online catalogues of other libraries; once you have identified where material is held you may decide to to request material or to visit another institution.
The Templeman Library has joined several schemes that provide you with access to other libraries, including many other higher education institutions, some of which have substantial education collections. Some of those schemes provide you with reference access, while others allow borrowing material.
See the other libraries page for full information on the various access or delivery schemes available.