Book  (1936)  Page(s) 753.  
 
Welter, Frau Nicola (HT) Jacobs 1908; Kais. Aug. Viktoria X Sunset; orange with saffron-yellow, outer petals greenish tan-yellow, large, very double, fine form, fragrance 5/10, floriferous, continuous bloom, autumn bloomer, long upright stems, dense foliage, growth 7/10, well-branched. Sangerhausen

Magazine  (10 Jun 1911)  Page(s) 278.  
 
The Parentage of Roses.
The following list of the world's Roses and their parentage has been compiled by Mr. Robert Daniel, 38 Russell Road. Fishponds, Bristol, and by his kind permission we are enabled to publish it...
Frau Nicola Welter... Hybrid Tea, Jacobs, 1908, Kaiserin Augusta Victoria X Sunset

Website/Catalog  (1911)  Page(s) 8.  
 
New Roses from 1910.
Frau Nicola Welter  Orange with saffron-yellow; flowers large, full, and perfectly formed; fine perfume; distinct. 

Magazine  (Jun 1908)  Page(s) 88.  
 
La Roseraie de Bagatelle.
Ci-dessous, nous donnons la liste des variétés qui seront présentées au concours ce mois-ci.
47. Frau Nicola Welter (Hybride de Thé), issue de Kaiserin A. Victoria X Sunset. — Obtenteur, M. N. Welter, en Allemagne.

Magazine  (1908)  Page(s) 72.  
 
Frau Nicola Welter is not bad, like a well-double Safrano.