Centre for studies of the person: Carl Rogers’ memorial library. This includes not just many papers by Rogers, but also papers from Maureen O’Hara and other person-centered people.
Peter Schmid has a list of his papers available online.
Universities often have repositories. If you find a paper on PCEP for example that you can’t access, you can look up the university that the author is based at, and see if they have a repository
Strathclyde – Mick Cooper, Robert Elliott and Beth Friere are all based here – just put their names in.
Open University has a similar repository with over 50 articles on counselling
If you have a google account and are a student in UK higher education, rather than doing a scholar.google.com search for papers and then searching your university search engine for papers, it is possible to link the two so that hits that come up in google can be accessed via your university info straight away with no separate search.
Address general enquiries to email@example.com