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Chalk and clay for Portland cement - R T Roussel. Diorama, Museum of Practical Geology. From a Lantern slide. Credit: Christina Walsh. |
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Chalk and clay for Portland cement - R T Roussel. Diorama, Museum of Practical Geology. From a Lantern slide. Credit: Christina Walsh. | Chalk and clay for Portland cement - R T Roussel. Diorama, Museum of Practical Geology. From a Lantern slide. Credit: Christina Walsh. | ||
== Licencing == | == Licencing == | ||
Credit: Christina Walsh | |||
Latest revision as of 10:33, 28 June 2020
Summary
Chalk and clay for Portland cement - R T Roussel. Diorama, Museum of Practical Geology. From a Lantern slide. Credit: Christina Walsh.
Licencing
Credit: Christina Walsh
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:12, 28 June 2020 |  | 1,400 × 500 (498 KB) | Scotfot (talk | contribs) | Chalk and clay for Portland cement - R T Roussel. Diorama, Museum of Practical Geology. From a Lantern slide. Credit: Christina Walsh. |
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