user22, u., & 		Obaid, s.
(2019).
 The origins of the fixed professions and their differentiation.
<em>Journal Of Tikrit University For Humanities - مجلة جامعة تكريت للعلوم الانسانية, 24</em>(1), 96-108.
doi:10.25130/hum.v24i1.192