Catalogue
- Books
The ophthalmeter by Javal-Schiötz and the international market / Isolde den Tonkelaar.
Tonkelaar, Isolde denDate: 1992- Books
The historical Utrecht ophthalmic instruments and their written sources / Isolde den Tonkelaar, G.K. van Leersum, H.E. Henkes.
Tonkelaar, Isolde denDate: 1994- Books
The Utrecht Ophthalmic Hospital and the development of the ophthalmoscope / Isolde den Tonkelaar, Harold E. Henkes & Gijsbert K. van Leersum.
Tonkelaar, Isolde den.Date: 1988- Books
Eye and instruments : nineteenth-century ophthalmological instruments in the Netherlands / Isolde den Tonkelaar, Harold E. Henkes, Gijsbert K. van Leersum.
Tonkelaar, Isolde den.Date: 1996- Books
The Utrecht Ophthalmic Hospital and the development of tonometry in the 19th century / Isolde den Tonkelaar, Harold E. Henkes & Gijsbert K. van Leersum.
Tonkelaar, Isolde den.Date: 1988