Rubidium
A Dictionary of Scientific Terms · 1927 · p. 3
A metallic element. Symbol: Rb.
Bu kavram başka kaynaklarda da geçiyor
Adair's New Encyclopedia (1923)
The American Illustrated Medical Dictionary (1913)
Chamber's Twientieth Century Dictionary (1908)
An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
An Illustrated Encyclopedic Medical Dictionary (1894)
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