& AL_Badri A. GRAVITY MODEL IN FOREIGN TRADE (APPLICABALE CASE ABOUT THE SKINS IN IRAQ DURING THE PERIOD (1990-2014). IRAQI JOURNAL OF AGRICULTURAL SCIENCES [Internet]. 13Aug.2017 [cited 20Nov.2019];48(4). Available from: http://jcoagri.uobaghdad.edu.iq/index.php/intro/article/view/360