Article (magazine)  (2009)  Page(s) 31.  
 
'White Provence'   Source RJBM [Réal Jardin Botanico Madrid] Chromosome Number 28

Book  (3 Jan 2001)  Page(s) 72.  
 
Unique Centifolia. It is perhaps the earliest authentic sport that we have; it is still the only one that has kept so long without showing any inclination to return to the Type... it is the only one in which sporting has changed the color so noticeably.

Book  (Apr 1999)  Page(s) 136.  
 
Unica Centifolia... 'Unique de Provence' is a sport of this rose.

Book  (Mar 1999)  Page(s) 148.  
 
Unique Blanche Gallica. Before 1834.

Book  (1997)  Page(s) 154-155.  Includes photo(s).
 
('White Provence', 'Unique Blanche', 'Vierge de Clery', R. centifolia alba) Discovered in UK 1775. Description and vital statistics. Probably a sport from another Centifolia. In good weather, the flowers of this rose are quite the most beautiful of all white roses.

Book  (Nov 1994)  Page(s) 55.  
 
Centifolia Alba  The rose figured under this name by Bunyard is the Hybrid Damask Rose 'Mme Hardy'.  It is quite possible that 'Mme Hardy' has Centifolia parentage, but is not fit to be classed as a true Rosa centifolia variety, and is usually found among the Damasks in old French books. 

Book  (Apr 1993)  Page(s) 619.  
 
Unique Blanche Centifolia, white, sometimes tinged pink, 1775, ('Blanche Unique'; 'Vièrge de Clery'; 'White Provence'); Resembles Cabbage Rose, of which it is presumed to be a sport.

Book  (1993)  Page(s) 29.  Includes photo(s).
 
Unique Provence Centifolia... was, and still is, grown at Malmaison...

Book  (1988)  Page(s) 18-19, 21.  Includes photo(s).
 
Page 18-19: [Photo] White Provence ('Unique Blanche') discovered in Suffolk in 1775.
Page 21: White Provence or 'Unique Blanche'... discovered in eastern England in 1775 and judged today by Peter Beales as one of the most beautiful of all white roses.

Book  (1988)  Page(s) 24.  
 
Unique Centifolia... listed in Hovey's Cambridge Nurseries 1845 catalogue...