Somwatcharajit, R., Sookruksawong, S. and Prakamhang, J. 2026. Development of a Biofertilizer from Indigenous PGPR and Leonardite Residues for Sustainable Lettuce Cultivation and Soil Restoration. CURRENT APPLIED SCIENCE AND TECHNOLOGY. 26, 6 (Jan. 2026), e0268134. DOI:https://doi.org/10.55003/cast.2026.268134.