Britton James A. Eugene L. Walsh.
Matczak, Wanda Trzcinka-Ochocka, Małgorzata Chmielnicka, Jadwiga
Hałatek, Tadeusz Sinczuk-Walczak, Halina Szymczak, Maria Rydzyński, Konrad
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
The American Welding Society
Wittczak, Tomasz Walusiak, Jolanta Pałczyński, Cezary
Matczak, Wanda Przybylska-Stanisławska, Magdalena
Fish, Gilbert Dudley.