Book  (1936)  Page(s) 90.  
 
Bolkoburg (HP) Dr. Krüger 1917; Tom Wood X Pss. de Béarn; bright crimson-scarlet, medium-size, lasting, solitary, camellia-form, floriferous, continuous bloomer, short. Sangerhausen

Website/Catalog  (1923)  Page(s) 47.  
 
Hybrid Perpetuals .... Bolkoburg (Dr. Krüger, 1919). Scarlet-carmine.

Magazine  (Aug 1918)  Page(s) 48.  
 
The Rose Novelty Show on occasion of the Board meeting [of the German Rose Society] in Frankfurt...
The Co. Weber & Scheuermann, Bolkenhain, brought some of the new originations of Dr. Krüger to the show....
The blooms of 'Bolkoburg' (Tom Wood X Princesse de Béarne) were a bit small. The colour brilliant scarlet-red with light reflexes, solitary.

Magazine  (Jun 1918)  Page(s) 30.  
 
I became acquanted with Dr. Krüger's 'Bolkoburg' as new rose with great effect for groups. The habit is short, the bloom continuous and always solitary. The blooms did not discolour with me over many days. The descent is: Tom WoodXPrincesse de Béarn. I have used the latter rose gladly for crossings due to its lasting colour, one only has to choose pollen parents with quite long buds.
...Robert Türke, Meißen

Magazine  (1918)  Page(s) 30.  
 
Bolkoburg Good for massing; growth humble; flower not discoloring, very lasting; parentage 'Tom Wood' x 'Princesse de Béarn'

Magazine  (1918)  Page(s) 48.  
 
Bolkoburg Color bright scarlet, shiny, solitary

Magazine  (1916)  Page(s) 93.  
 
Bolkoburg [Name registration]