https://pm20.zbw.eu/category/ware/i/218757
In total 8 folders, 544 documents - folders complete until 1949.
For direct access to the documents, click the “(xy documents)” link, for folder information use the “(folder)” link.
For intellectual property law reasons accessible only from ZBW reading room.
Total number of images: 188
| Images on film h2/wa/W2107H/0646/L | Kohleveredelung |
| Images on film h2/wa/W2133H/1167/L | Kohleveredelung |