Book  (Apr 1999)  Page(s) 465.  
 
Frau Felberg-Leclerc Pernetiana. Felberg-Lcclerc 1921. Sport of 'Louise Catherine Breslau'. The author cites information from different sources... Yellow... pure golden yellow...

Book  (1936)  Page(s) 254.  
 
Felberg-Leclerc, Frau (Hybrid Lutea) Felberg-Leclerc 1921; Sport of Louise Catherine Breslau; deep cadmium-yellow to deep golden-yellow, medium to large, double, cup-form, lasting, solitary, fragrance 3/10, floriferous, continuous bloom, buds shaded dark red, long stems, good bronze-green foliage, growth 6/10, upright, well-branched. Sangerhausen

Website/Catalog  (1923)  Page(s) 42.  
 
Pernetianas ...  Frau Felberg Leclerc (Felberg, 1921). Cadmium-yellow. f 1.00.