Vth International Congress on X-Ray Optics and Microanalysis, Tubingen, September 9th-14th, 1968 == V. Internationaler Kongress fur Rontgenoptik und Mikroanalyse = V Congres International sur l'Optique des Rayons X et la Microanalyse - Mollenstedt, G.; Gaukler, K. H. (Springer-Verlag, 1969)