Book  (11 Jun 1993)  Page(s) 56.  
 
R. rugosa 'Alba' x 'Gloire de Dijon'. Muller (Germany) 1886. Description... the large semi-double blossoms are mid-pink... only limited availability...

Website/Catalog  (1967)  Page(s) 21.  
 
Rosa rugosa and hybrids ... Thusnelda (Dr. F. Müller, 1886) semi-double - pink

Book  (1947)  Page(s) 234.  
 
Rugosa. Thusnelda. Semi-double rose. Muller 1889. June.

Book  (1936)  Page(s) 706.  
 
Thusnelda (hybrid rugosa) Dr. Müller 1886; R. rugosa alba X Gloire de Dijon; tender silvery salmon-pink, fades to flesh-white, medium-size, semi-double, cup-form, large petals, many stamens, solitary or up to 3, fragrance 7/10, very floriferous, free-blooming, continuous bloom, upright stems, large wrinkly foliage, growth 8/10, upright, 1,50 m., hardy. Sangerhausen

Website/Catalog  (1933)  Page(s) 90.  
 
Thusnelda (Hybrid Perpetual). Light pink (8,5 ea), early-blooming (hybrid rugosa)...Low garden plants 1 piece RM [Reichsmark] -.45

Website/Catalog  (1926)  Page(s) 60.  
 
Rosa rugosa. Thusnelda (Dr. Müller - Weingarten 1899). Rugosa alba X Gloire de Dijon. Soft light pink, large, double, fragrant, high-centered. Early and often repeating. Most beautiful of all Rugosas.

Website/Catalog  (1925)  Page(s) 81.  
 
Hybrid Perpetuals...Thusnelda. Silvery pink, early-blooming (hybrid rugosa)...Low-grafted garden plants 1 piece G.-M. [Gold-Mark] -.80

Book  (1920)  Page(s) 106.  
 
Rosa rugosa hybrida
Bastarde der Gelben und der Kapuzinerrose
1830. Thusnelda. (R. rugosa alba X Gloire de Dijon.) Zart hellrosafarbene, hübsch gefüllte, duftende Blüten. Remontiert und ist winterhart.

Book  (1915)  Page(s) 35, 44.  
 
"Rugosa Roses"
by H. R. Darlington, Hon. Secretary N. R. S.
To those of our friends who are beginning to grow these Roses I am disposed to recommend the following selection:
Semi-double.
Blanc Double de Coubert, delicata, fimbriata, Thusnelda and Mrs. Anthony Waterer.
[...]
Thusnelda (Muller, 1889) has pale salmon pink semi-double flowers produced early and late. It is a strong grower and will make a bush 4 feet to 7 feet high. Mr. Paul mentions it as a Hybrid Perpetual hybrid, which seems not improbable, but it has also been attributed to rugosa alba x Gloire de Dijon (The Garden, 12th August, 1911). It is a charming Rose of its type, and well worth a place.

Magazine  (12 Aug 1911)  Page(s) 386.  
 
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...
Thusnelda... Hybrid Rugosa, Müller, 1889, R. rugosa alba X Gloire de Dijon