U. Sonntag (2015). Round Robin Test on “Microscopic Images of Cast Iron Samples” in the DGM Working Group “Quantitative Structural Analysis” of the Expert Committee Materialography. Practical Metallography: Vol. 52, No. 9, pp. 487-506. doi: 10.3139/147.110359 © Carl Hanser Verlag GmbH & Co. KG ISSN 0032-678X