Magazine  (Feb 1951)  Page(s) 1. trimester, p. 23.  
 
Registration internationale de roses nouvelles...
Nom original  Wilhelm
Nom modifié  Skyrocket

Magazine  (Jul 1948)  Page(s) 3. trimester, p. 22.  
 
Il est aussi un hybride de multiflore, arbuste de 1 à 2 mètres, vigoureux, qui séduit par l'élégance de son port et la permanence de sa floraison. C'est « Wilhelm », aux fleurs assez grandes, semi-doubles, rouge sang luisant, qui mériterait de notre part un effort de propagande en sa faveur.

Book  (1947)  Page(s) 258.  
 
Wilhelm (Hybrid Musk), known in the U.S.A. as Sky Rocket, makes a large bush or pillar rose with huge clusters of large, double, pointed flowers of dark red. Growth is very vigorous and erect, and foliage is glossy green. Kordes 1934...Exceptionally tall growth. Very fragrant....June-October. Hardy.

Website/Catalog  (1939)  Page(s) 123.  
 
Wilhelm. Climber or shrub rose which blooms throughout the whole summer in enormous panicles of large, double, dark amaranth-red blooms ....Low garden plants 1 piece RM [Reichsmark] 1.-   10 pieces RM 9,- , standards 1 piece RM 4.50

Book  (1936)  Page(s) 757.  
 
Wilhelm (multiflora, Lambertiana) Kordes 1934; Robin Hood X J. C. thornton; dark red, lasting, 7 cm., double, high-centered, lasting, in clusters of 3-25, fragrance 6/10 (honey), floriferous, repeats well, long strong stems, long pointed buds, large dense glossy foliage, growth 7/10, climbing, 2,50 m., dense, bushy. = Adam; in America: Skyrocket. Sangerhausen

Website/Catalog  (1935)  Page(s) Spring issue, p. 89.  
 
Wilhelm (W. Kordes' Sons 1934), Hybrid Tea. Everblooming rambler, which grows strongly upright,  and produces thrpughout summer large, well-double, blooms of bright red colour in large panicles.  ...Strong, lLow garden plants 1 piece RM [Reichsmark] 5.-