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This is to certify that your paper entitled «blast preloading as a potential substitution for surcharge and vacuum Preloading in weak clay reclamation» was indexed with 11 pages, in the CIVILICA citation database, code COI:GEOTEC05_072, after evaluation and approval of the referees of the "The 5th National Geotechnical Conference and the 2nd International Conference on Earthquake Engineering and Seismic Geotechnics held in Tabriz 2023.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.