https://test.blue.repub.idris.pub/ppl/207/ List of Publications en https://test.blue.repub.idris.pub/pub/3418/ Mon, 01 Apr 1963 00:00:01 GMT <div>P.M.A. Geurts</div> https://test.blue.repub.idris.pub/pub/847/ Sat, 01 Jun 1968 00:00:01 GMT <div>G.W.Th.M. Tomassen</div>