 |
| |||
| Köhlersches Beleuchtungsprinzip (method of microscopical illumination); Köhlersches Prinzip (method of microscopical illumination) | |||
|
| |||
| Köhlersches Beleuchtungsprinzip (method of microscopical illumination); Köhlersches Prinzip (method of microscopical illumination) | |||
