Book  (Apr 1999)  Page(s) 389-390.  
 
Charles K. Douglas Hybrid Tea. H. Dickson 1919. The author cites information from different sources... intense flaming scarlet...

Book  (Apr 1993)  Page(s) 86.  
 
Charles K. Douglas Hybrid Tea, medium red, 1919, Dickson, H. Description.

Website/Catalog  (1948)  Page(s) 49.  
 
Roses
Hybrid Tea and Everblooming
No. 1 grade...80¢ each
C. K. Douglas—brilliant light crimson

Website/Catalog  (1938)  Page(s) 14.  
 
Bush Roses
Charles K. Douglas (Hybrid Tea)... Scarlet crimson. Faint Tea perfumed. Introduced 1919.

Website/Catalog  (1938)  Page(s) 23.  
 
Charles K. Douglas (A. Dickson & Son 19). Vivid bright scarlet with velvety carmine, large, double, fine form, fragrant, floriferous and continuous bloom

Website/Catalog  (1936)  Page(s) 6.  
 
Charles K. Douglas Hybrid Tea (Hugh Dickson 1919) Description.

Book  (1936)  Page(s) 216.  
 
Douglas, Charles K. (HT) H. Dickson 1919; bright scarlet, shaded velvety fiery crimson, large, double, fragrance 5/10, floriferous, continuous bloom, growth 6/10, upright. Sangerhausen

Website/Catalog  (1934)  Page(s) 90.  
 
Charles K. Douglas (Hybrid Tea). Vigorous blooms, upright, dark scarlet-red (7,5 tc) ...Low garden plants 1 piece RM [Reichsmark] -.45  standards 1 piece RM 1.60

Website/Catalog  (1933)  Page(s) 90.  
 
Charles K. Douglas (Hybrid Tea). Vigorous blooms, upright, dark scarlet-red ...Low garden plants 1 piece RM [Reichsmark] -.45  standards 1 piece RM 1.60

Website/Catalog  (1929)  Page(s) 121.  
 
Charles K. Douglas (Hybrid Tea). Vigorous blooms, upright, bright scarlet-red, shaded velvety crimson ...Low garden plants 1 piece RM [Reichsmark] 1.-