Student uses a slide rule
Engineering class. A student uses a slide rule. (c. 1972) [Image printed in Parks Bulletin, 1972-73, p104]
Wedi'i Gadw mewn:
| Prif Awdur: | |
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| Fformat: | Online |
| Cyhoeddwyd: |
1972
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| Mynediad Ar-lein: | http://cdm17321.contentdm.oclc.org/cdm/ref/collection/photos/id/4365 |
| Tagiau: |
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