?url_ver=Z39.88-2004&rft_id=10.4028%2Fwww.scientific.net%2FAMR.626.440&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=M.R.M.&rft.aulast=Mokhtar&rft.au=Mokhtar%2C+M.R.M.&rft.isbn=9783037855713&rft.volume=626&rft.issn=10226680&rft.pages=440-444&rft.atitle=A+study+of+unmanned+aerial+vehicle+photogrammetry+for+environment+mapping%3A+Preliminary+observation&rft.title=Advanced+Materials+Research&rft.date=2013&rft.genre=article