- SammlungPP - Katharina Thiessen fonds
- Volume 5028 - "Dr." Katharina Thiessen
- Akt1 - Frau Henriette Davidis, Praktisches Kochbuch für die Deutschen in Amerika, Milwaukee, Wisconsin.
- Akt2 - Arzneibuch für das Deutsche Reich Dritte Ausgabe (Pharmacopoea Germanica), Berlin.
- Akt3 - Pharmacopoea Germanica, Berlin.
- Akt4 - Dr. Katharina Thiessen note book of recopies, book A.
- Akt5 - Dr. Katharina Thiessen note book of recipes
- Akt6 - Dr. Katharina Thiessen note book of recipes.
- Akt7 - 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
- Akt8 - Jacob Martens family register of children
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