Website/Catalog  (2012)  
 
Website

Flower Power, ('Bluewunder', Blühwunder®, 'Koredan', 'Ponderosa'),
F, mp, Kordes; flowers clear salmon-pink, medium, semi-dbl to double , open, borne in clusters, intense, sweet fragrance; continuous bloom; foliage bronzy green, turning dark green, glossy; neat, vigorous, rounded-off (5-6 ft.) growth

Book  (2004)  Page(s) 102.  Includes photo(s).
 
Blühwunder® Description

Website/Catalog  (31 Dec 1998)  Page(s) 53.  Includes photo(s).