Book  (Apr 1999)  Page(s) 402.  
 
Frau Oberhofgärtner Singer Hybrid Tea. Lambert 1908. Parentage: 'Jules Margottin' (HP) x 'Eugène Boullet' (HT)... pink...

Book  (Apr 1999)  Page(s) 556.  
 
Frau Oberhofgärtner Singer Hybrid Tea. Peter Lambert 1908

Book  (Apr 1993)  Page(s) 192.  
 
Hybrid Tea, pink blend, 1908. 'Jules Margottin' x 'Mme. Eugénie Boullet'; Lambert, P. Flowers soft pink edged white; fragrant.

Book  (1946)  Page(s) 35.  
 
Alister Clark.  Save the Roses.
i have had good seedlings from Frau O. Singer to name a few, and yet cannot now procure plants of them.  It is easy to see that we may lose Roses that are invaluable for breeding

Website/Catalog  (1938)  Page(s) 25.  
 
Hybrid Teas. Frau Oberhofgärtner Singer (P. Lambert 08) Vigorous, long bud, large bloom, quite double, fresh pink with tender white, center deep pink, fragrant.

Book  (1936)  Page(s) 667.  
 
Singer, Frau Oberhofgärtner (HT) Lambert 1908; J. Margottin X Mme. Eug. Boullet; fresh pink, center deep pink, edges tender white, large, 3/4-full, cup form, fragrance 5/10, floriferous, repeats well, long buds, growth 6/10, well-branched, bushy. Sangerhausen

Website/Catalog  (1921)  Page(s) 64.  
 
Hybrid Teas...Pink...Frau Oberhofgärtner Singer

Magazine  (10 Jun 1911)  Page(s) 278.  
 
The Parentage of Roses.
The following list of the world's Roses and their parentage has been compiled by Mr. Robert Daniel, 38 Russell Road. Fishponds, Bristol, and by his kind permission we are enabled to publish it...
Frau Oberhofgärtner Singer... Hybrid Tea, Lambert, 1908, Jules Margottin X Mme. Eugénie Boullet

Website/Catalog  (1911)  Page(s) 8.  
 
New Roses from 1910.
Frau Oberhofgartner Singer Very strong, large and perfectly formed, but long and elegant, colour clear flesh pink, with white edge.

Magazine  (24 Sep 1910)  Page(s) 490.  Includes photo(s).
 
Frau Oberhofgärtner Singer (Abbildung Titelseite) ist ebenfalls ein reicher Blüher und hat genügenden Wuchs. Die lange Knospe öffnet sich leicht zu einer schönen Blume, die nicht zu sehr gefüllt ist. Die Farbe ist frischrosa mit weißem Rande. Als Schnitt- und Gartenrose ist diese Sorte wertvoll.