Send the following on WhatsApp
Continue to ChatNDT Nondestructive Testing Handbook (2nd Edition) https://www.weldinginfo.org/welding-handbooks/ndt-nondestructive-testing-handbook-2nd-edition/
NDT Nondestructive Testing Handbook (2nd Edition) https://www.weldinginfo.org/welding-handbooks/ndt-nondestructive-testing-handbook-2nd-edition/