@inproceedings{paperid:1007897,
author = {Sanaei Nejad, Seyed Hossein},
title = {Assessment of Drought in a long time period, using standardized precipitation index (SPI). A case study of Mashhad area},
booktitle = {Thiird Symposium for European Freshwater Sciences},
year = {2003},
location = {ادینبورگ, ENGLAND},
keywords = {Drought; SPI; Khorasan},
}