URL: https://www.researchgate.net/publication/257581511/figure/fig1/AS:671527129333784@1537115952672/Scanning-electron-micrographs-a-raw-material-IN-b-CD-LAC-MCC-b-reference-mixtures.png
URL2: https://www.researchgate.net/figure/Scanning-electron-micrographs-a-raw-material-IN-b-CD-LAC-MCC-b-reference-mixtures_fig1_257581511