Analysis of Long-Term Global Solar Radiation, Sunshine Duration and Air Temperature Data of Ankara and Modeling with Curve Fitting Methods Journal title: Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji Authors: Mehmet YEŞİLBUDAK, Medine ÇOLAK, Ramazan BAYINDIR Subject(s):