(2009). An economic study to estimate the cost functions of barley crop production in the Al-Jabal Al-Akhdar region for one agricultural season (2002-2006).. test, 23(1), 68-79. doi: 10.21608/fjard.2009.197048
. "An economic study to estimate the cost functions of barley crop production in the Al-Jabal Al-Akhdar region for one agricultural season (2002-2006).". test, 23, 1, 2009, 68-79. doi: 10.21608/fjard.2009.197048
(2009). 'An economic study to estimate the cost functions of barley crop production in the Al-Jabal Al-Akhdar region for one agricultural season (2002-2006).', test, 23(1), pp. 68-79. doi: 10.21608/fjard.2009.197048
An economic study to estimate the cost functions of barley crop production in the Al-Jabal Al-Akhdar region for one agricultural season (2002-2006).. test, 2009; 23(1): 68-79. doi: 10.21608/fjard.2009.197048