?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=PJW+den&rft.au=Hartogh%2C+PJW+den&rft.aulast=Hartogh&rft.degree=Master&rft.title=Verbetering+door+Verduurzaming&rft.date=2011