- FondsPP - Katharina Thiessen fonds
- Volume 5028 - "Dr." Katharina Thiessen
- 1 more...
- File2 - Arzneibuch für das Deutsche Reich Dritte Ausgabe (Pharmacopoea Germanica), Berlin.
- File3 - Pharmacopoea Germanica, Berlin.
- File4 - Dr. Katharina Thiessen note book of recopies, book A.
- File5 - Dr. Katharina Thiessen note book of recipes
- File6 - Dr. Katharina Thiessen note book of recipes.
- File7 - Materials collected and created by Shirley Bergen regarding Dr. Katherine Thiessen. Included are copies of letters by Thiessen published in newspapers, photocopied family photos and documents, 6, 4, and 1 page articles about the life of Dr. Thiessen written by Bergen
- File8 - Jacob Martens family register of children
- File9 - Jacob Martens family register of children