زهره نصيف فليح, & شيماء اكرم احمد. (2022). Quantitative symbols and their problems and the basic rules to be followed in the representation of maps of the population of Diyala Governorate. Mustansiriyah Journal for Sciences and Education, 23(1), 351–367. https://doi.org/10.47831/mjse.v23i1.1100