TY - JOUR TI - THE DETERMINATION OF THE VARIATION OF EFFECTIVE SOURCE TO SKIN DISTANCE WITH FIELD SIZE AND ELECTRON ENERGY ON SATURNE 42 LINEAR ACCELERATOR AU - BASRİ GÜNHAN, AU - AYŞE KOCA, AU - BAYRAM DEMİR, AU - SONGÜL KARAÇAM, JO - Turk J Oncol PY - 2002 VL - 17 SP - 086 EP - 089 DO - ER -