Article (misc)  (22 Jul 2009)  
 
Dr Frank Leith Skinner papers

Isa Murdock. R. altaica x double white spinosissima; thorny shrub to three feet; spinosissima type foliage, flowers double white, in some seasons tinged pink. Very free flowering over a fairly long season."

Book  (Apr 1993)  Page(s) 262.  
 
Isa Murdock Hybrid Spinosissima (Old Garden Rose), flowers white, sometimes tinged with pink, 1953, R. spinosissima altaica x Dbl. white spinosissima; Skinner...

Book  (1967)  Page(s) 48.  
 
Some All-Canadian Roses
by Fred Blakeney, Victoria, B.C.
Now we come to the Dean of Canadian Hybridizers in the person of Dr. Frank L. Skinner of Dropmore, Manitoba, who has been hybridizing roses and other plants for over sixty years. [...]
Other originations followed in succession, the chief ones being:
"Isa Murdock", R. spinosissima x double white spinosissima. Double white, thorny. Very free bloom over a long period.

Website/Catalog  (1954)  Page(s) 11.  
 
Isa Murdoch - A hardy double altai hybrid, grows to 3 feet tall, very free flowering, in bloom for about six weeks in June and July. The flowers are white, sometimes suffused or tipped with pink. Each....$2.00"