O. A. Kayumov, Y. K. Diallo and A. N. Yefremov 2021. SOME ISSUES OF RE-UTILIZATION OF CASING STRINGS, UNUSED WATER WELLS (ON THE EXAMPLE OF SOME COUNTRIES OF THE SOUTH-WESTERN SAHEL). Innovative Technologica: Methodical Research Journal. 2, 12 (Dec. 2021), 138–146. DOI:https://doi.org/10.17605/OSF.IO/S2P6M.