Book  (1958)  Page(s) 220.  
 
Margo Koster (Sunbeam). Pol. (D. A. Koster, '31.) Dick Koster sport. Slightly fragrant, globular, orange-red; cluster. Dwarf. Fine forcer and edger. (14)

Book  (1955)  Page(s) 117.  
 
'Margo Koster' Orange pink to pink, with the petals curling inwards. Especially suitable for bouquets and indoor decoration. Among florists and market-gardeners this rose is known as the 'Parisian Rose'.

Book  (1945)  Page(s) 200.  
 
Margo Koster. Pol. Bic. (Koster '35) ARA '37; PP '4S-'44. . XIII. Packard, Cal.: (1 pl., 1 yr.) Here is a treasure that really deserves some advertising. Plant symmetrical, with mildew-proof foliage. Blooms continuously, flowers last indefinitely. A grand shade of salmon, quite unfading...

Magazine  (1940)  Page(s) 419.  
 
Margo Koster, a pink-yellow hybrid polyantha, distributed by Kordes....