K. Ranieri, A.F.B. Costa, and C. Kiyan (2009). Stratified Sampling Applied to Estimation of the Volumetric Fraction of Alumina in Cast Metal Matrix Composites. Practical Metallography: Vol. 46, No. 8, pp. 408-423. doi: 10.3139/147.110021 © Carl Hanser Verlag GmbH & Co. KG ISSN 0032-678X