Book  (2008)  Page(s) 40.  
 
Graph 3 Parent Roses derived from the Hybrid Rugosa Max Graf...
Svejda selection G12, a tetraploid seedling derived from open pollination of Max Graf.

Magazine  (1995)  Page(s) 146.  
 
In an article entitled "'George Vancouver' Rose" by Ian S. Ogilvie and Neville P. Arnold, HortScience (1995) 30(1), p. 146, the pedigree of 'George Vancouver' appears in Figure 1.