Ion and mixed conducting oxides as catalysts / by P.J. Gellings and H.J.M. BouwmeesterIntroduction to corrosion prevention and control / P.J. Gellings ; foreword by G. SvedeniusIntroduction to corrosion prevention and control / P.J. Gellings ; foreword by G. SvedeniusInleiding tot corrosie en corrosiebestrijding / P.J. GellingsIntroduction to corrosion prevention and control / P.J. GellingsCorrosiebewust ontwerpen / P.J. Gellings, T. FransenInleiding tot corrosie en corrosiebestrijding / P.J. GellingsIntroduction to corrosion prevention and control for engineers / P. J. Gellings ; foreword by E. Börje BergsmanTheoretical considerations on the kinetics of electrode reactions / Paul Johann GellingsBeweging in strukturen / door Paul Johann GellingsSnel of langzaam : rede uitgesproken ter gelegenheid van de 14e dies natalis van Technische Hogeschool Twente op 28 nov. 1975 / P.J. GellingsIntroduction to corrosion prevention and control / P.J. Gellings ; foreword by G. Svedenius