a research on tati dialect of northern khorasan and its application in the correction and the description of persian literature

tati dialect of northern khorasan is one of the oldest dialects of ancient iran which has structural differences with its other variations. sharing common words with the other tati dialects, especially those of azerbaijan and ghazvin, shows that tati dialect of northern khorasan, like others, is one of the dialects existing in pre-islamic era. this dialect is also one of those dialects in which has common words with the old persian literature and the correction of these texts needs a better understanding of this dialect. the writer of this article studies the common points between the dialect and the