Rollers
Encyclopedia Sinica · 1917 · p. 501
(birds). See Anisodactyl i.
Bu kavram başka kaynaklarda da geçiyor
Adair's New Encyclopedia (1923)
Dictionary of Science, Literature and Art (1854)
Dictionary of Science, Literature and Art (1842)
A Military Dictionary (1810)
Friction Rollers
—
A Dictionary of Military Terms (1918)
Friction-rollers
—
Nuttall's Standard Dictionary of the English Language (1890)
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