A STUDY ON CLAY SOIL IMPROVEMENT WITH BACILLUS SUBTILIS BACTERIA AS THE ROAD SUBBASE LAYER. International Journal of Geomate, [S. l.], v. 15, n. 52, p. 114–120, 2018. Disponível em: https://geomatejournal.com/geomate/article/view/797. Acesso em: 4 oct. 2026.