Article (magazine)  (Jan 1955)  Page(s) 59.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Japanese, Pink, 'Nira' (Ober. 1934), [Nurseries] Oberlin Peony Gardens

Website/Catalog  (1939)  Page(s) [1].  
 
Tree Peonies (Pæonia arborea)
Japanese Tree Peonies 
English translation in parentheses
48. Nira (Oberlin, 1934). Very large; extremely double; light salmon-rose. A very fine variety and a good bloomer... $10.00