Book  (1936)  Page(s) 329.  
 
Harding, Mrs. Warren G. (HT) Pierson 1923; sport of Columbia; deep pink, otherwise like Columbia. Sangerhausen

Website/Catalog  (1928)  Page(s) 19.  
 
Hybrid Teas, Teas  and Pernetiana.
Mrs. Warren G. Harding. Hybrid Tea. (A. N. Pierson Co., 1923.) Sport of Columbia. Strong, vigorous, free bloomer; very fragrant; deep pink.

Magazine  (1928)  Page(s) 211.  
 
Columbia (HT) E. G. Hill 1919) Ophelia X Mrs. George Shawyer....
b) Mrs. Warren G. hading HT (A. M. Pierson 1924) Sport of Columbia

Website/Catalog  (1926)  Page(s) 30.  
 
New Roses for 1926. Mrs. Warren G. Harding (HT. A. N. Pierson) A lovely shade of glowing rose pink. Every bud develops into a perfectly formed flower. Splendid habit. Very free flowering. Sweetly scented; handsome foliage. Everyone who likes the improved forms of "Columbia' will welcome this admirable sister of that variety. 4/. each.
Deeper than Columbia. Good,

Book  (1925)  Page(s) 102.  
 
Dr. William L. Hess, Denver, Colo. More Denver Rose News.
'Mrs. Warren G. Harding', a sport of 'Columbia', though darker and richer in color, has a peculiar stippled effect, even more pronounced than 'Columbia' Supreme' of the same habit and growth as its parent, but distinctive in color.

Website/Catalog  (1924)  Page(s) 18-19.  
 
Rosiers Nouveaux de 1924. Rosiers Hybrides de Thé...
MRS WARREN G. HARDING (A. N. Pierson Inc., 1924). Fl. rose foncé, coloris particulièrement joli au début et vers la fin de la floraison. Arb. vig. Accident fixé de la variété « Columbia». Cette variété comme sa devancière se prête excellemment pour jardins. Variété très appréciée aux Etats-Unis où elle a obtenu plusieurs distinctions.