Book  (1988)  Page(s) 22.  
 
('Progress') Kordes crossed a yellow Hybrid Tea with a Polyantha.

Book  (1958)  Page(s) 118.  
 
Fortschritt (Progress). F. (Kordes, '33.) Mrs. Pierre S. du Pont X Gloria Mondi. Large, semi-dbl., open, slightly fragrant, yellow-pink; cluster. Fol. glossy, light. Vig., bushy.

Book  (1953)  Page(s) 66.  
 
Fortschritt - 21

Book  (1953)  Page(s) 175.  
 
[synonyms] Progress Fortschritt

Magazine  (Jun 1948)  Page(s) 2. trimester, p. 23.  
 
Hybrides de Polyanthas resultant du croisement de Polyanthas avec des Hybrides de Thé ....
Fortschritt, Gloria Mundi x Mme P. du Pont; Très grande, corymbes, rose teinté de jaune, feuillage vernissé, convient pour obtenir par hybridation des hybrides de Polyanthas jaunes.

Book  (1947)  Page(s) 148.  
 
Fortschritt (Hybrid polyantha) seems really much more akin to the Pernetiana type whilst producing clusters of semi-double salmon flowers, shaded with yellow, on vigorous upright-growing bushes. Kordes 1933...VVery fragrant...June-September. Hardy.

Website/Catalog  (1938)  Page(s) 44.  
 
Polyantha and their Hybrids (Dwarf Bedding Types)
No pruning necessary except to remove the past season's flower stems.
Fortschritt... Salmon and yellow. Produced in enormous trusses. The blooms come in such quick succession that the plant is never out of bloom throughout the seasons. An excellent sort. Recommended. Introduced 1934.

Website/Catalog  (1937)  Page(s) 122.  
 
Fortschritt. Large-bloomed hybrid polyantha, with very large, quite double blooms. Growth is even, the colour primrose-yellow (2 ia), shaded orange-red (6 ga)... . Low garden plants 1 piece RM -.55  10 pieces RM 5.-

Book  (1936)  Page(s) 107.  
 
John Poulsen.  New Roses at Canterbury, N.Z.
Fortschritt. A very pretty hybrid Polyantha Rose resembling Felicia in some ways. In hot weather the colour faded to almost white. Lately the colour, salmon and yellow, has been very fine and the plants are literally covered with flowers.

Website/Catalog  (1936)  Page(s) 46.  
 
New Roses 1935.  Fortschritt  Hyb. Poly.  (W. Kordes Sohne 1933) F. 2. An unusual Polyantha which will gain many admirers.  Color is salmon yellow which fades almost to white in summer, but spring and autumn blooms are really good.  Extra free flowering with a rich musk scent. 15 petals.  E.