Book  (Apr 1993)  Page(s) 218.  
 
Golden Scepter, Climbing Climbing Hybrid Tea, deep yellow, 1956, ('Climbing Spek's Yellow'); Walters.

Website/Catalog  (1977)  Page(s) 23.  Includes photo(s).
 
Grimp. SPEEK YELLOW  - végétation normale - Larges fleurs, semi-doubles, en corymbes, d'un très beau jaune paille clair

[no longer listed in 1979]

Website/Catalog  (1972)  Page(s) 8.  
 
Sported Climbers
Clg. Spek's Yellow Brilliant canary yellow. t.sd. C.

Website/Catalog  (1963)  Page(s) 14.  
 
Climbing Roses. Climbing Spek's Yellow  HT. Semi-double fragrant, brilliant yellow blooms borne several in a cluster. 

Book  (1958)  Page(s) 15.  
 
Harry H. Hazlewood. Some New Roses For 1958. 
Climbing Spek's Yellow (Walters 1956) Glistening golden yellow.

Website/Catalog  (1958)  Page(s) 6.  
 
Novelty Roses 1958 Climbing Spek's Yellow Clg HT. (Walters, 1956.) Intense bright yellow semi-double fragrant blooms borne above glossy foliage. An outstanding colour. 10/6 each.