F. H. OMAR B.S.C. THE CHANGES IN INPUT-COEFFICIENTS. Dirasat in Economics and Business , [S. l.], v. 5, n. 1, 1969. DOI: 10.37376/deb.v5i1.1515. Disponível em: https://next.fannak.com/index.php/DEB/article/view/1515. Acesso em: 23 aug. 2026.