List of Articles شاخص استاندارد شده بارش Open Access Article Abstract Page Full-Text 1 - - marzieh tatina mahmood roshani atoosa bigdeli Open Access Article Abstract Page Full-Text 2 - ٍEvaluation of drought return period using standardized precipitation index (SPI) in Fars province, Iran Nader Pirmoradian Seyyed Amir Shamsnia Fardin Boustani Mohammad Ali Shahrokhnia