Book  (Apr 1993)  Page(s) 365.  
 
Mary Nish Hybrid Tea, Flowers white, center tinted shell-pink [w], 1928, ('White Radiance'); 'Red Radiance' sport; Pacific Rose Co.

Book  (1940)  Page(s) 135.  
 
Mary Nish  (White Radiance). HT. (Pacific Rose Co., '28). Red Radiance sport.  Very large, dbl., fragrant, white, tinted shell-pink in center.  Fol. Rich green, soft glossy. Vig., bushy. 

Book  (1938)  Page(s) 50-52 vol 23.  
 
Sporting Tendencies of Newer vs. Older Roses
P. J. Hjort
As to Radiance sports, only Red Radiance and Mrs. Charles Bell follow the type closely in plant-growth, foliage, and form of the flowers. Mary Nish is a distinct departure, being rather inferior and quite different. It is not white, nor has it any other points to recommend it except its vigorous growth. 

Magazine  (May 1937)  Page(s) vol. 2, no. 3, p. 30.  
 
Yellow Radiance? White Radiance?
Pretty soon the popularity of Radiance started two things: hybridization to get other colors, and hopes for sports. The sport occurrence is not rare, and a White Radiance was soon reported from Miami, which investigation proved to be a fake. Then came a Texas report, and White Radiances from all over, the last and worst of them having been run down within a few months as nothing more or less than a Kaiserin Auguste Viktoria renamed, despite its total difference of habit, shape, and general character.

The rose-swindler will keep busy with Radiance, but it may be assumed that until the American Rose Society's Registration Committee has accepted any rose as a White Radiance, or a Yellow Radiance, "there ain't no such animile." This is said with much confidence and assertion, because registrations which have been offered by sincere, honest members of the Society, first for Yellow Radiance and then for White Radiance, were withdrawn when it was found that the parentage was not as claimed.

Book  (1936)  Page(s) 237.  
 
White Radiance, HT, J.H. Nicolas (originator), Jackson & Perkins Co. (registrant)

Book  (1936)  Page(s) 514.  
 
Nish, Mary (HT) Pacific Rose Co. 1928; sport of Red Radiance; white, center mother-of-pearl-pink, very large, well double, lasting, solitary, fragrance 4/10, floriferous, continuous bloom, growth 6/10, bushy. White Radiance.

Website/Catalog  (1928)  
 
MARY NISH (White Radiance) -- Sport of Red Radiance
This newest creation, is a sport of Red Radiance which is being introduced to the public this year. It is noted for abundance of fine blooms on long stems and glossy dark green leaves, and is the rarest production among rose varieties. The flowers are white, tinted with faint shell pink in the center. It's a very easy grower with rich foliage and plenty of flowers. It has been test and proven to be absolutely new in its type.