Book  (Jan 2000)  Page(s) 185.  
 
Hi-Mabel Herbaceous Peony. Bockstoce 1961. A semi-double pink hybrid.

Magazine  (Sep 1963)  Page(s) 25.  
 
Originations of W. S. Bockstoce [Included with his obituary]
Note: All these are hybrids of Officinalis Rubra and some lactiflora variety.
Hi-Mabel (1961). D. E. P. Double, early, rose center, brilliant bright pink.