F. H. OMAR B.S.C. THE CHANGES IN INPUT-COEFFICIENTS. دراسات في الاقتصاد والتجارة , [S. l.], v. 5, n. 1, 1969. DOI: 10.37376/deb.v5i1.1515. Disponível em: https://journals.uob.edu.ly/DEB/article/view/1515. Acesso em: 27 2025.