Book  (Aug 2002)  Page(s) 46.  
 
Happy
Polyantha 1954
Rated 8.1

Book  (2001)  Page(s) 48.  
 
Happy Polyantha, medium red, 1954. Rating: 8.0

Website/Catalog  (4 Jan 1999)  Page(s) 27.  Includes photo(s).

Book  (Sep 1993)  Page(s) 210.  Includes photo(s).
 
Happy ('Alberich') Polyantha. deRuiter 1954. Description... it bears as many small crimson flowers as can be crammed onto the bush...

Book  (Apr 1993)  Page(s) 233.  
 
Happy Polyantha, currant-red, 1954, ('Alberich'); 'Robin Hood' x 'Katharina Zeimet'; deRuiter. Description.

Book  (1958)  Page(s) 149.  
 
Happy (Alberich in Germany). Pol. (de Ruiter; int. Gregory and Willicher baumschulen, '54.) Robin Hood X Katharina Zeimet seedling. Very small, semi-dbl., currant-red; large truss. Fol. dark, glossy. Vig., compact (12-15 in.); free bloom. (14)