Book  (Jun 1992)  Page(s) 145.  
 
Polar Bear Hybrid Perpetual. Nicolas, 1934. Parentage: 'Schoener's Nutkana' x 'New Century'. [Author cites information from different sources.]

Book  (1958)  Page(s) 302.  
 
Polar Bear. Shrub. (Nicolas; int. J&P, '34.) Schoener's Nutkana X New Century. Large, very dbl., globular, very fragrant, white tinted blush, becoming pure white; long, strong stem. Fol. large, leathery, wrinkled. Vig., bushy; abundant, recurrent bloom. Pl. Pat. 132 (released).

Book  (1936)  Page(s) 34.  
 
Harry H. Hazlewood.  The New Roses of 1936. 
Polar Bear is an interesting hybrid between Nutkana, Rugosa and Polyantha.

Website/Catalog  (1936)  Page(s) 42.  
 
New Roses 1936.  Polar Bear (HT.  J. H. Nicolas 1934) New type, very hardy, hybrid of Rugosa, Nutkana and Polyantha. Large, full blooms of H.T. type, white with faint blush, very fragrant and a continuous bloomer. 4/- each.
Not flowered yet.

Book  (1936)  Page(s) 570.  
 
Polar Bear (HT) Nicolas 1934; Schoener's Nutkana X New Century; white, shaded light pink, fades to pure white, large, very double, globular, lasting, fragrance 6/10 (wild rose9, floriferous, continuous bloom, long strong stems, wrinkled foliage, growth 6/10, upright, bushy, hardy.

Book  (1935)  Page(s) 47.  
 
R. Marion Hatton.  New Roses in America
Nicolas' Polar Bear was the only interesting white I saw. It is said to be a mixture of Rugosa, Nutkana and Polyantha. The plants are like hybrid perpetuals, the fully-double flowers are white with a faint blush. While it is a good garden Rose, its greatest value seems to be in its possibility as an ancestor; with that mixture of blood it should be able to do quite a lot of interesting begatting.

Book  (1933)  Page(s) 238.  
 
Notes registration of Polar Bear as a Hybrid Tea.