Source references
- Thüne, Sabine: Auf den Spuren von Ernst Jakob Christoffel. Ein Lebensbild mit Selbstzeugnissen und Bilddokumenten. Herausgegeben von der Christoffel-Blindenmission. ISBN: 3000055479 (ISBN-13: 9783000055478)
- Thüne, Sabine (Hrsg) Ernst Jakob Christoffel – Ein Leben im Dienst Jesu. Nürnberg, VTR, 2007. ISBN: 9783937965390
- Burial site
- Integrated, people-centred eye care, including preventable blindness and impaired vision. WHO Executive Board, 146th session; provisional agenda item 12, December 9, 2019. https://apps.who.int/gb/ebwha/pdf_files/EB146/B146_13-en.pdf
- World Report on Vision; World Health Organisation 2019. ISBN 978-92-4-151657-0 https://apps.who.int/iris/bitstream/handle/10665/328717/9789241516570-eng.pdf?sequence=18& (accessed May 4, 2021)
- Thylefors B. WHO program for the prevention of blindness. Int Opthalmol1990: 14: 211
- https://cooperation.gouvernement.lu/fr/cooperation-au-developpement/pays-partenaires.html (accessed May 5, 2021)
Picture references
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