Irma Maulina Hanafiah, U. et al. 2018. Changes in the Meaning of Primary Elements of the European Region in Medan City, Sumatra Island, Indonesia. International Journal of Engineering & Technology. 7, 4.7 (Sep. 2018), 453–457. DOI:https://doi.org/10.14419/ijet.v7i4.7.27358.