URL https://www.researchgate.net/profile/Franz-Meyer-2/publication/229169182/figure/fig4/AS:300884052463616@1448747756096/Photomicrographs-showing-the-quartz-and-scheelite-microstructures-in-XZ-and-YZ-sections_Q640.jpg
URL2https://www.researchgate.net/figure/Photomicrographs-of-D-2-fabrics-a-Asymmetric-S-2-S-3-crenulation-cleavage-with_fig2_229169182
