CROSTHWAITE, D.G. WRITING A GOOD SPECIFICATION FOR ENQUIRY DOCUMENTS. Clean Air Journal, [S. l.], v. 7, n. 1, p. 19–25, 1986. DOI: 10.17159/caj/1986/7/1.7345. Disponível em: https://cleanairjournal.org.za/article/view/7345. Acesso em: 3 may. 2024.