Optotypi ad visum determinandum secundum formulam =
d/D. Ed. 8, metrico systemate.

APA Citation

Snellen, H. (Herman). (1885). Optotypi ad visum determinandum secundum formulam =: d/D. Ed. 8, metrico systemate. London: Williams and Norgate.

MLA Citation

Snellen, H. (Herman), 1834-1908. Optotypi Ad Visum Determinandum Secundum Formulam =: D/D. Ed. 8, Metrico Systemate. London: Williams and Norgate, 1885.

Warning: These citations may not always be complete (especially for serials).