TY - JOUR AU - Editorial Office PY - 2019/07/31 Y2 - 2024/03/29 TI - ESJ July COVER PAGE JF - European Scientific Journal, ESJ JA - ESJ VL - 15 IS - 20 SE - Articles DO - 10.19044/esj.2019.v15n20p%p UR - https://eujournal.org/index.php/esj/article/view/12234 AB - , ER -