http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sugar beet nutrient deficieny symptoms:a color atlas and chemical guide.Şeker Pancarı besin yetersizligi belirtileri:renkli Atlas ve Kimyasal rehber
Albert Ulrich,F.Jackson Hills Çev.,Kamil Erel.