Book  (2000)  Page(s) 176.  
 
‘Contrast = Hybride de Thé. Contraste de couleurs pour cette fleur bien double au cœur étroitement turbiné, rose de Chine et bronze sur l’avers, blanc ombré de bronze au revers… buisson compact, mais de grande vigueur, au feuillage coriace et vernissé… Howard & Smith 1937.

Book  (Apr 1999)  Page(s) 392.  
 
Contrast Hybrid Tea. Howard & Smith 1937... Deep pink, white exterior...

Book  (Sep 1993)  Page(s) 130.  Includes photo(s).
 
Contrast Large-flowered. Parentage: Unnamed seedling x 'Talisman'. Fred Howard 1937. Description... Salmon-pink, often shaded deeper, and cream on the reverse...

Book  (Apr 1993)  Page(s) 108.  
 
Contrast Hybrid Tea, china-pink and bronze, reverse white and bronze, 1937, Seedling x 'Talisman'; Howard & Smith. Description.

Book  (1976)  Page(s) 61.  
 
According to Suschkow, also the sorts 'Contrast', 'Ramon Bach', 'Leni Neuss', 'Kathrine Kordes' and especially 'Staatspräsident Päts' are suitable components for hybridisation, especially the last sort produces as seed plant vigorous shrubs with long, straight canes, which end with a bloom at the tip.

Book  (1943)  Page(s) 81.  
 
Dr. A. S. Thomas.  An Exhibitor's Opinion.
Contrast: Frequent confused centres in small flowers of striking colour combination on very vigorous plants. Not my type.

Book  (1942)  Page(s) 79.  
 
Dr. A. S. Thomas.  Victoria.  The Best of Recent Introductions
Contrast (Howard and Smith, 1937), one plant one year old: Very vivid bicolour and seems to have none of the Pernetiana faults that one is apt to expect in this colour group. Vigorous growth. Blooms not very large and usually have divided centres.

Book  (1941)  Page(s) 78.  
 
John Poulsen, NZ.  South Island Roses. 
Contrast made extra nice growth and produced lovely colour, but the stem is inclined to be weak and there is a tendency for some of the flowers to droop. It is very free.

Book  (1940)  Page(s) 88.  
 
John Poulsen, South Island Roses.
Contrast. Splendid growth and foliage and very free flowering. Opening colour very fine. Often it has been a bright velvety red with a yellow reverse, later shading off to pink, with a whitish reverse. It is a very striking Rose, possessing considerable garden merit.

Book  (1939)  
 
p23.  Harry H. Hazlewood.  The New Roses of 1939. 
In Contrast HT. Howard & Smith have scored a definite success with a bicolour bloom after the style of 'Juliet', but on outstandingly vigorous, healthy growth. The habit is tall and upright, while the blooms carry 40 to 50 petals.

p74.  R. Marion Hatton.  An American Review of the New Roses. 
From the same [Howard and Smith] breeder, Mrs. Georgia Chobe, a larger spiral bloom of light pink, and Contrast, with fully double flowers of coppery pink with a straw coloured reverse, are both making friends. The former seemed to be the better Rose, although the public will go for the spectacular bloom of Contrast, even if it does fade quickly.