Website/Catalog  (4 Jan 1999)  Page(s) 7.  Includes photo(s).

Website/Catalog  (4 Jan 1999)  Page(s) 7.  
 
Frontier Twirl Description... Large (4- to 5-inch), shallow-cupped flowers are an orange-pink-yellow blend... disease resistant...

Book  (Sep 1993)  Page(s) 184.  Includes photo(s).
 
Frontier Twirl Modern Shrub. Griffith Buck 1984. Description... The flowers are exceptional, blending coral-orange and gold. Parentage: 'La Sevillana' x 'Just Joey'

Book  (Apr 1993)  Page(s) 196.  
 
Frontier Twirl Shrub, pink blend, 1984, 'Sevilliana' x 'Just Joey'; Buck, Dr. Griffith J. Description.

Book  (1990)  Page(s) 117.  Includes photo(s).
 
Frontier Twirl Buck 1979. Very modern in its concept, this Buck hybrid stands out among all the others of his raising. Deep salmon-pink buds open to medium salmon, double blooms of hybrid-tea shape.