JOHN G. The effect of Bacillus Pumilus on the free swell and atterberg limits of black cotton soil for use in road subgrades. JOURNAL OF BASICS AND APPLIED SCIENCES RESEARCH, [S. l.], v. 2, n. 1, p. 135–141, 2024. DOI: 10.33003/jobasr-2024-v2i1-41. Disponível em: https://jobasrfudutsinma.com/index.php/ojs-files/article/view/303. Acesso em: 1 apr. 2026.