?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Visscher+H.J.&rft.aulast=Visscher+H.J.&rft.degree=Master&rft.title=Evolution+of+information+channels+within+the+tourist+sector%3A+A+case+study+about+Riga&rft.date=2015