%0 Journal Article %T TISSUE TRACE ELEMENTS IN PATIENTS WITH HEAD AND NECK CANCER %A N AYAN, %A İNCİ AYAN, %A E BEDER, %A AHMET NAFİZ KARADENİZ, %A A OKAN GÜRSEL, %J Turk J Oncol %D 1990 %V 5 %P 1033-1036 %R