Alle Welt soll sein Wort hören. Lausanner Kongress für WeltevangelisationBilly Graham, John Stott, Peter Beyerhaus u.a.1974PDF46 MB
Welding and Allied Processes -- Determination of Hydrogen Content in Arc Weld MetalIIW International Institute of Welding2018
Welding and Allied Processes. Determination of Hydrogen Content in Arc Weld MetalThe British Standards Institution2018