The map is not needed, interpretation of maps is OR. But I found a Russian source on Abdallar:  It's Russian toponimical dictionary. It says that until 1923 Lachin was a village by the name of Abdallar, after the Turkic tribe of abdaly that lived there. In 1923 it was made a town, and in 1926 renamed to Lachin. So if no one objects this source can be used in the article as a reference.