Book  (Apr 1993)  Page(s) 288.  
 
King Boreas Floribunda, pure yellow shading to nearly white, 1941, 'Golden Glow' x Seedling; Brownell. Description.

Website/Catalog  (1963)  Page(s) 16.  
 
Hybrid Polyantha or Floribunda Roses. King Boreas Fragrant, pure yellow blooms shading to nearly white.  Very vigorous and free flowering.  Double. Tall. 

Website/Catalog  (1961)  Page(s) 12.  
 
Hybrid Polyantha or Floribunda Roses. King Boreas Pure yellow. Double. Medium growth. 

Book  (1952)  Page(s) 131.  
 
Noel Cutler, N.Z. 
King Boreas: A perfectly formed yellow of medium size (classed in America as a Floribunda).

Book  (1942)  Page(s) 12.  
 
R. Marion Hatton.  The World's Novelties
I had a chance to study Anne Vanderbilt, King Boreas and Red Robin, Brownell's Wichuraiana H.T's mentioned last year. They bloomed freely early but stopped in early autumn. The flowers do not have the quality you require and seem to be popular only in the colder districts.

Book  (1941)  Page(s) 43.  
 
R. Marion Hatton.  An American Review of the New Roses
The Brownells have three Hybrid Teas of their " sub-Zero" strain, supposedly hardy under severe winter conditions. Wichuraiana blood in their ancestry accounts for more suppleness in the canes than is popular in Hybrid Teas, but the strain is finding a welcome in the Northern States. The new ones are King Boreas, pure yellow, and.... They are all double and fragrant.

Website/Catalog  (1941)  Page(s) [3].  
 
Sub-Zero Hybrid Teas
King Boreas. HT. (The Brownells, 1941.) Propagation rights reserved. Very double lemon yellow flowers, a constant bloomer. $1.50 each.