Book  (Nov 1997)  Page(s) 3.  
 
Traditionally, cultivars from the polyantha and floribunda classes have been used for pot rose forcing... 'Dick Koster' and 'Margo Koster' (polyanthas) have been used extensively... The floribunda 'Garnette' and its many sports (e.g. 'Carol Amling', 'Marimba', and Bright Pink Garnette')... Until recently, they were still among the mainstays of the pot rose forcing industry in North America, especially for large containers...

Book  (Apr 1993)  Page(s) 132.  
 
Dick Koster Polyantha, deep pink, 1929, 'Anneke Koster' sport; Koster, D.A.

Book  (Jun 1992)  Page(s) 244.  
 
Dick Koster Polyantha. Koster, 1929. Sport of 'Anneke Koster'. [Author cites information from different sources.]

Website/Catalog  (1977)  Page(s) 20.  Includes photo(s).
 
DICK KOSTER: rose fonce (50 cm).

Book  (1976)  Page(s) 45.  
 
location 37, I/3; Dick Koster (D. A. Koster 1929) Pol., deep pink, small, double, short

Website/Catalog  (1975)  Page(s) 17.  
 
DICK KOSTER, rose foncé

Website/Catalog  (1970)  Page(s) 36.  
 
location 37, Dick Koster (M. Koster 1932) Polyantha

Website/Catalog  (1960)  Page(s) 25.  
 
DICK KOSTER (Koster 1940). Fleurs globuleuses rose orangé foncé.  LO [légèrement odorantes]. VB [végétation basse].

Book  (1958)  Page(s) 82.  
 
Dick Koster. Pol. (D. A. Koster, '29.) Deep pink sport of Anneke Koster.

Website/Catalog  (1957)  Page(s) 29.  
 
DICK KOSTER (Koster 1940) Petites fleurs globuleuses rose orangé foncé. Végétâtion basse convenant pour la mise en pots.