Book  (1940)  Page(s) 19.  
 
Vincent Berger, Bokau bei Aussig, Czechoslovakia. 'Bergrat Otto Berger'... Bergrat Otto Berger. Hybrid Tea. (V. Berger; introduced by A. Faist, 1924)... creamy white to sulphur, deeper center.

Book  (1936)  Page(s) 70.  
 
Berger, Bergrat Otto (HT) Berger 1924; Pharisäer X Pr. de Bulgarie; cream-white to sulphur-yellow, center orange, large, double, cup-form, lasting, solitary, fragrance 5/10, floriferous, continuous bloomer, glossy broncegreen foliage, long stems, growth 6/10. Sangerhausen