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

162
by Daudel, R.
Published 1974
Springer Netherlands

163
by Hunt, R.
Published 1990
Springer Netherlands

165
by Daudel, R.
Published 1973
Springer Netherlands

166
by Clack, R.
Published 1972
Springer Netherlands

167
by Tyson, R.
Published 1995
Springer Netherlands

168
by Halmshaw, R.
Published 1995
Springer Netherlands

169
by Srivastava, R. S.
Published 1994
Springer Netherlands

170
by Janssen, R.
Published 1992
Springer Netherlands

171
by Flude, R.
Published 1991
Springer Netherlands

173
by Snook, R.
Published 1974
Springer Netherlands

174
by Skousen, R.
Published 1992
Springer Netherlands

177
by Lowen, R.
Published 1996
Springer Netherlands

178
by Peters, R.
Published 1997
Springer Netherlands

179
by Srinivasan, R.
Published 2014
Springer India

180
by Craig, R.
Published 2011
International Monetary Fund