Book  (2005)  Page(s) 48.  
 
location F:170, Dilly's Wiederkehr Schwartzbach 1925, hybrid lutea, yellowish pink to cream, large, double, medium height

Article (magazine)  (Dec 1951)  Page(s) 462.  
 
Dilly's Wiederkehr Translation: "Dilly's Return". Pernetiana. Schwartzbach 1925... Pink...

Book  (1936)  Page(s) 757.  
 
Wiederkehr, Dilly's (hybrid lutea) Schwarzbach 1925; sport of Mme. Ed. Herriot; pink, somewhat shaded (yellower and fuller than Herriot), large, double, floriferous, continuous bloom, growth 6/10, bushy. Sangerhausen