Book  (Apr 1993)  Page(s) 427.  
 
Pacemaker Hybrid Tea, deep pink, 1981, (HARnoble); 'Red Planet' x 'Wendy Cussons'; Harkness. Description.

Book  (1993)  Page(s) 165.  Includes photo(s).
 
Hybrid Tea. Harkness (Britain) 1981. ('Red Planet' x 'Wendy Cussons')

Book  (May 1992)  Page(s) 396.  
 
Pacemaker (Harnoble) Hybrid Tea. Harkness (UK) 1981... Clear, bright reddish-pink...