An Improved Method Of Testing Distant Vision Acuity In Schools
Autor: | Elkington, J. S. C. |
---|---|
Zdroj: | The British Medical Journal, 1908 Oct . 2(2494), 1219-1219. |
Databáze: | JSTOR Journals |
Externí odkaz: |
Autor: | Elkington, J. S. C. |
---|---|
Zdroj: | The British Medical Journal, 1908 Oct . 2(2494), 1219-1219. |
Databáze: | JSTOR Journals |
Externí odkaz: |