?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Osama+Yousef+Ali&rft.aulast=Ghidan&rft.au=Ghidan%2C+Osama+Yousef+Ali&rft.title=The+isotopic+composition+of+Zn+in+natural+materials&rft.date=2008&rft.degree=PhD