. 2013 Apr 28;2013:606524. doi: 10.1155/2013/606524
Copyright © 2013 Tsai-Lung Weng et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 14.
SEM images of M20 specimens.