| Title: | Echelle 30g/mm. |
| Authors: | Bausch & Lomb Inc. |
| Contributors: | Hurn, Mark |
| Keywords: | diffraction gratings |
| Issue Date: | 1965 |
| Publisher: | Institute of Astronomy Library |
| Description: | Identification photograph |
| URI: | http://www.dspace.cam.ac.uk/handle/1810/243766 |
| Appears in Collections: | Images from the Institute of Astronomy Library |
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