?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=EL+GHARAAS%2C+Youssef&rft.aulast=EL+GHARAAS&rft.aufirst=Youssef&rft.date=2003&rft.title=Preliminary+study+of+the+organic+citrus+nursery+management+&rft.inst=IAMB+Mediterranean+Agronomic+Institute+of+Bari