?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Wijaya&rft.aulast=Ariyadi&rft.au=Ariyadi%2C+Wijaya&rft.date=2009&rft.atitle=Hypothetical+Learning+Trajectory+dan+Peningkatan+Pemahaman+Konsep+Pengukuran+Panjang&rft.title=Seminar+Nasional+Matematika+dan+Pendidikan+Matematika+2009&rft.issn=978%E2%80%90979%E2%80%9016353%E2%80%903%E2%80%902&rft.genre=article