Dr. Nidal abu ZahraALAA FOUAD M MOMENA2022-06-022022-06-0237946https://drepo.sdl.edu.sa/handle/20.500.14154/63553USING PYTHAGOREAN FUZZY SETS (PFS) IN MULTIPLE CRITERIA GROUP DECISION MAKING (MCGDM) METHODS FOR ENGINEERING MATERIALS SELECTION APPLICATIONSThesis