Book  (Mar 1999)  Page(s) 97.  
 
Ruth Gallica. Wright (Canada) 1947. Description... double and light crimson...

Book  (1997)  Page(s) 146.  
 
Wright (Canada) 1947. 'Mary L. Evans' x 'Alika'. Description and vital statistics. A modern Gallica with soft crimson semi-double to double clusters of flowers.

Book  (Apr 1993)  Page(s) 528.  
 
Ruth Gallica, medium red, 1947, 'Mary L. Evans' x 'Alika'; Wright, P.H. Description...

Book  (1967)  Page(s) 46.  
 
Some All-Canadian Roses
by Fred Blakeney, Victoria, B.C.
Mr. Percy Wright of Saskatoon, Sask., must be considered one of the foremost hybridizers of species and near species roses in North America. He has been working on these roses for many years, and knows the reactions of various hardy roses when crossed with species roses.
His objective has always been to produce worthwhile garden roses that are hardy enough to withstand the extremely low temperatures of the Prairies in winter. [...]
Here is a list of Mr. Wright's originations in chronological order of introduction:
1947 "Ruth", red, a more double form of "Alika" (seedling).

Website/Catalog  (1949)  
 
"RUTH* - a descendant of Alika, and resembles it, except that the flower is more double, and the scarlet tones are a little less in evidence. Almost completely hardy, undoubtedly the hardiest "Old Rose" ever introduced. Nothing else in its color tone is so far available among hardy roses. A rose with a future."

Percy Wright Catalogue - Hardy and Semi-Hardy Roses - p. 9