Book  (19 Apr 2000)  Page(s) 231.  
 
'HORSTMANN'S BERGFEUER', Floribunda, dr, 1954; flowers dark blood-red, well-formed, very large, borne in clusters, dbl.; moderate growth; [World's Fair X Independence]; Horstmann

Book  (1958)  Page(s) 29.  
 
Bergfeuer. F. (Horstmann, '54.) World's Fair X Independence. Very large, dbl., well formed, dark blood-red; very large cluster. Growth moderate; free bloom.

Magazine  (1956)  Page(s) 203.  
 
Bergfeuer 659408 [trademark]