Media type: E-Article Title: Estimation of the demand-supply system of the Egyptian gray cement using 2SLS-PC method Contributor: احمد سيد احمد imprint: 2021 Published in: Maǧallaẗ Al-Buḥūṯ Al-Mālīyyaẗ wa Al-Tiğāriyyaẗ Language: Arabic; English DOI: 10.21608/jsst.2021.93695.1323 ISSN: 2090-5327; 2682-3543 Origination: Footnote: Access State: Open Access