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Description
Scientific Worker. One of the first articles about the Radium Institute.[Khlopin, Vitaly] [Scientific Worker]. Nauchnyi Rabotnik. No 3. Moskva, Rabotnik prosvesheniia, 1926. 8vo, 128 pp. In original wrappers. Uncut. In good condition, lightly bowed, light wear to wrappers, some soiling, crack to spine. One of the first articles about the Radium Institute. One of 1 000 copies published. This issue features an article by Vitaly Khlopin (1890 1950), a prominent radiochemist, professor, and director of the Radium Institute of
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Best in 7 days
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Best in 7 days
4.3 ★★★★★
Based on 1422 reviews
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Product Reviews
★★★★★ 5
Honda crv filter
Size: 9.5" x 10.9" x 2.1"
Good cabin filter for my 2019 Honda crv
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
★★★★★ 5
Easy to Install. Good Quality.
Size: 8" x 10" x 2"
Installing a cabin air filter is easier than one might think. There are also many videos online to demonstrate changing the filter on your particular vehicle. They do get dirty and can impede air flow. This is a higher quality filter and worth paying a few dollars more.
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Reviewed in the United States on December 4, 2023
★★★★★ 5
Well worth it
Size: 8" x 10" x 2"
For my 2023 Honda pilot this was an awesome replacement and it smells actually very good. Well worth the money. Fit perfectly
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Reviewed in the United States on December 29, 2024
★★★★★ 5
All I need is the air that I breathe and to love you
Size: 8" x 10" x 2"
What a feeling! With the engine air filter changed, the engine was able to take deeper, longer breaths, eventually reaching that famous “runners high” you hear so much about.
The new interior air filter changed the atmosphere into crisp, clean mountain fresh air, causing my passengers and me to spontaneously yodel with abandon. Here’s to believing!
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Reviewed in the United States on January 2, 2026
★★★★★ 4
Wasn’t green but confirmed with Ecogard that it’s the correct filter
Size: 8" x 10" x 2", Size: 8" x 10" x 2"
As the title says the filter wasn’t green this time (purchased 3 other times). I read off the numbers to Ecogard technical support and they said it was their filter and by the date code manufactured by a different factory. This one was grey/black with blue edge and you could tell there was charcoal embedded in it. Not sure if it will perform the same and smell the same, as I preferred the scent of the green one. The listing needs to be updated with the correct picture if the green isn’t made anymore.
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Reviewed in the United States on March 11, 2026
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