Book  (Apr 1993)  Page(s) 551.  
 
Hybrid Tea, pink blend, 1924, 'Columbia' sport; Leonard. Flowers clear silver-pink,

Book  (1936)  Page(s) 166.  
 
Columbia, Silver (HT) Leonard 1924; sport of light Columbia; light silvery whitish pink, very large, very double, Lasting, fragrance 7/10, floriferous, continuous Bloom, habit like Columbia.

Magazine  (May 1928)  Page(s) 42.  
 
Rapport de M. Bernaix, sur les meilleures Roses nouvelles de 1924...
Silver Columbia (William A. Leonard). — Fleur grande pleine, coloris rose argenté clair, pédoncule long. Bouton allongé. Floraison abondante.

Website/Catalog  (1928)  Page(s) 8.  
 
Hybrid Teas, Teas  and Pernetiana.
Columbia Silver. Hybrid Tea. (Leonard, 1924.) A sport of Columbia and a stronger grower, a larger and better flower, perfectly formed. A beautiful shade of deep silvery pink, deepening in color as the flower opens. Awarded silver medal by the American Rose Society.

Magazine  (1928)  Page(s) 211.  
 
Columbia (HT) E. G. Hill 1919) Ophelia X Mrs. George Shawyer....
d) Silver Columbia HT (William Leonhard 1924) Sport of Columbia

Website/Catalog  (1925)  Page(s) 30.  
 
New Roses 1925. 'New Columbia'. (HT) (E. G. Hill. Co,) A distinct and excellent sport of ‘Columbia’ which it is claimed does not exhibit in the same degree, the tendency to deformed blooms sometimes found in the parent. The colour is somewhat lighter and the variety is declared to be practically identical to Silver Columbia sent out by another grower.