R
R, or r, is the eighteenth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''ar'' (pronounced ), plural ''ars'', or in Ireland ''or'' ().The letter is the eighth most common letter in English and the fourth-most common consonant, after , , and . Provided by Wikipedia
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15by Nogovitsyn, R R, Romanov, A RGet access
Published in IOP Conference Series: Earth and Environmental Science (2020)
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Article in Journal/Newspaper -
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