?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Jong&rft.aufirst=Mark+de&rft.au=Jong%2C+Mark+de&rft.date=2023&rft.title=The+influence+of+the+mix+of+modalities+on+the+walking+safety+of+older+adults+in+Zwolle%2C+Groningen%2C+and+Utrecht.&rft.tpages=26&rft.degree=Bachelor