Boufenneche، W. (2021). Determinants of Agricultural Productivity in the United State of America during the Period 1970-2017. مجلة التواصل، مج27, عدد خاص ، 210 - 223. مسترجع من http://search.mandumah.com/Record/1368147
Boufenneche، Wassila. "Determinants of Agricultural Productivity in the United State of America During the Period 1970-2017." مجلة التواصل مج27, عدد خاص (2021): 210 - 223. مسترجع من http://search.mandumah.com/Record/1368147