Book  (Sep 1993)  Page(s) 389.  Includes photo(s).
 
Summer Snow Cluster-flowered... introduced in 1938 by Jackson & Perkins, it is a sport of 'Climbing Summer Snow', raised by the French firm of Couteau two years earlier. Until the introduction of 'Iceberg' it was the most popular white cluster-flowered Rose in the United States... a low-growing, heavy-blooming white bush...

Book  (Apr 1993)  Page(s) 581.  
 
Summer Snow Floribunda, white, 1938, 'Summer Snow, Climbing' sport; Perkins, C.H. Description.

Book  (1960)  Page(s) 82.  
 
Nancy Steen.  Roses in a White Garden. 
....we have planted Summer Snow, a Floribunda. This rose has clusters of upright growing small crinkly flowers, set delightfully amongst shiny, light green foliage. We find also its climbing sport useful on a trellis.

Book  (1953)  Page(s) 66.  
 
Summer Snow - 14