"Merck medicinal charcoal, application for registration 1929 for: powdered charcoal: boxes 25 g., 50 g., 100 g., 250 g., 500 g.; granular charcoal: boxes 25 g., 100 g.; silvered tablets: boxes. 50x0.25 g. and 50x0.10 g." Subfile
"Ministerial Decree 29/10/1975 and Circular No. 93 of 20/11/1975; Elimination of preservation methods". Subfile