Book  (Apr 1999)  Page(s) 404.  
 
Gertrude Hybrid Tea. A. Dickson 1903. Sport of 'Countess of Caledon' (HT). The author cites information from different sources... Flesh pink...

Book  (Jun 1992)  Page(s) 277.  
 
Gertrude Hybrid Tea. A. Dickson, 1903. Sport of 'Countess of Caledon' (Hybrid Tea, A. DIckson, 1897, pale pink with darker center)... Flesh pink...

Book  (1936)  Page(s) 296.  
 
Gertrude (HT) A. Dickson 1903; sport of Ctss. of Caledon; flesh-pink, large, double, floriferous, growth 7/10, like Caledon.

Magazine  (10 Jun 1911)  Page(s) 278.  
 
The Parentage of Roses.
The following list of the world's Roses and their parentage has been compiled by Mr. Robert Daniel, 38 Russell Road. Fishponds, Bristol, and by his kind permission we are enabled to publish it...
Gertrude... Hybrid Tea, A. Dickson, 1903, Sport Countess of Caledon

Book  (1906)  Page(s) 66.  
 
4.284. Gertrude, Hybride de Thé, Dickson 1903 rose carné

Booklet  (1904)  Page(s) 9.  
 
New Hybrid Tea Roses.
Gertrude  (A. Dickson & Sons, 1903)). A beautiful blush sport from  Countess of Caledon (HT); growth vigorous.