Book  (1936)  Page(s) 729.  
 
Verlet, Cécile (HT) Walter 1926; Marianna Rolfs X Nordlicht; yellow, fades to pink, medium-size, double, flat, solitary or up to 5, floriferous, repeats well, growth 6/10, bushy. Sangerhausen

Book  (Dec 1928)  Page(s) 237.  
 
Cécile Verlet Hybrid Tea. (Louis Walter, 1926.) 'Marianna Rolfs' x 'Nordlicht'... yellow passing to rose-pink...