Book  (2005)  Page(s) 146.  
 
location K:III/5a, Olga Tschechowa, Cocker 1978, HT, yellow, very large, very double, strong fragrance, moderate height

Book  (19 Apr 2000)  Page(s) 428.  
 
olga Tschechowa, HT, ly, 1978; flowers creamy yellow, very large, very double, intense fragrance.