Book  (1981)  Page(s) 113.  
 
The German grower Paul Brauer, who settled down in San Remo, left us three HT roses, 'King of Siam', 'Contessa Cecilia Lurani' and 'Dr Warner'; and three Teas, 'Earl of Mexborough', 'Fürstin Infantin von Hohenzollern' and 'Wilhelm Hartmann'.

Book  (1936)  Page(s) 332.  
 
Hartmann, Wilhelm (tea) Bräuer 1902; M. van Houtte X Papa Gontier; bright red to fresh pink, base yellowish, double, fine form, floriferous, autumn-bloomer, growth 6/10, upright

Website/Catalog  (1914)  Page(s) 15.  
 
Tea Roses. Wilhelm Hartmann. Fresh rose-pink, base yellowish, improved Papa Gontier.

Magazine  (1911)  Page(s) 134.  
 
Mr. Bräuer in San remo is actually the only one who pays his full attention to breeding new Hybrid Teas. His successes are quite satisfactory, especially in Riviera-roses; take for example his Contessa Caecilia Lurani, Fürstin Bülow, Wilhelm Hartmann, Prinzessin Viktoria von Battenberg, Zarina Alexandra, and foremost, his newest rose, King of Siam. I especially liked a very dark bluish black rose, a seedling of General Mac Arthur, which has not been named yet and not yet propagated, but gave me the impression that it could be play a great role next season on the Boulevards of Paris. The villa of Mr. Bräuer at the foot of Monte Solare near San Remo....

Book  (1910)  Page(s) 109.  
 
Recommendable Forcing Roses....
Tea rose, Wilhelm Hartmann, soft pink on yellow base, P. Bräuer, 1908, elongated bloom, for early forcing!

Book  (1910)  Page(s) 103.  
 
Best group roses of all classes...
Tea roses, Wilhelm Hartmann, red with yellowish, P. Bräuer, 1908, good growth, elongated, well double bloom, similar to Papa Gontier, but better.

Magazine  (1904)  Page(s) 166.  
 
In the last edition of Rosenzeitung, Mr. P. Bräuer of San Remo reports on a Maréchal Niel seedling.... if it takes as long as Wilhelm Hartmann, Dr. Wauer and Contessa Cecilia Lurani, announced a long time ago....

Book  (1902)  Page(s) 83.  
 
Thé. 2079. Wilhelm Hartmann (Dingee-Conard 1901), carmin

Magazine  (1901)  Page(s) 29.  
 
Wilh. Hartmann, the improved Papa Gontier, light red....