Book  (Apr 1993)  Page(s) 231.  
 
Hamburg Shrub, dark red, 1935, 'Eva' x 'Daily Mail Scented Rose'; Kordes. Description.

Book  (1985)  Page(s) 31 & 132.  Includes photo(s).
 
Hamburg ....'Eva x 'Daily Mail Scented'....

Book  (1982)  Page(s) 350.  
 
Hamburg S. (Kordes, 1935). 'Eva' x 'Daily Mail Scented Rose'. Deep scarlet, large, semi-double, flat, some scent, many together on strong stems, recurrent, growth upright, bushy, medium, foliage matt, not very dense. GiS 16; GSR 169

Book  (1980)  Page(s) 186.  
 
The more modern Hybrid Musks like 'Wilhelm', 'Will Scarlet' and Hamburg, with their habit of growth more closely resembling tall Floribundas, have their trusses of bloom mainly at the top and are grand for growing behind and peering over the kind of wall, about 60cm (2 ft) high, which is often to be found dividing a garden from the highway.

Website/Catalog  (1975)  Page(s) 19.  
 
HAMBOURG (Kordès Sohne 1935}. Coloris rouge feu écarlate nuancé de rouge très foncé, variété exceptionnellement résistante atteignant 1 m. 50 de hauteur.

Book  (1971)  Page(s) 114.  
 
....'Elmshorn....came from a cross between the so-called Hybrid Musk Hamburg (which actually had no claim even to that wholly inaccurate class name)...

Book  (1964)  
 
p23 I was fortunate in being able to develop a race of very hardy continuous-flowering shrub roses. These include the deep crimson Hamburg (1935), the orange scarlet 'Bonn' (1950), and the deep purple-red 'Elmshorn' (1950), which are now widely grown as shrub roses.

p209 Hamburg Kordes 1935. Large, semi-double, opening flat. Dark, velvety-red with yellow stamens. Up to 20 blooms in cluster. 3.5 inches. Good fragrance. Early flowering. Winter hardiness -10 degrees C. (14 degrees F). Upright grower to about 4.5 ft. short pillar, hedge, groups. Resistant to disease.

Book  (1961)  
 
Hamburg Shrub. Kordes, 1935. 'Eva' x 'Daily Mail Scented'. Deep crimson, semi-double in clusters, perpetual flowering, slightly fragrant. Erect specimen bush to 6 feet.

Book  (1959)  Page(s) 37.  
 
Dr. R. S. Rodney Francis. Disease Resistant Roses.
‘Eva’ has already been mentioned. Kordes has used it freely as a parent. From it were raised Baby Chateau, Orange Triumph, Eutin, Rosenmarchen, Hamburg, Sangerhausen and Herrenhausen….

Book  (1955)  Page(s) 60.  
 
Wilhelm Kordes. Roses in Germany.
....Besides these free-flowering dwarf types, there was a demand for repeating hardy bush roses and long ago I began to hybridise with a dwarf but extremely free flowering Musk Rose of Pemberton's 'Robin Hood'. This gave some seedlings with larger flowers, hardy and making bushes up to three or for feet high and with a real crop of blooms in the late summer. Some of these seedlings notably 'Eva' and Hamburg were used again for breeding. From these, we got a real strain of perpetual bush roses that could be used for hedges or as specimen plants or in the border as small groups. ....This absolute fungus resistance led to further attempts to get the immunity into dwarfer forms. It soon became evident that the factor that prevented fungus growth on the 'Eva' and 'Hamburg' types were easily transmitted to seedlings and we soon had a splendid collection of absolutely foolproof sorts that made the Hybrid Polyantha type the ideal plant for public gardens and private gardens where little spraying or attention were possible.