Book  (1981)  Page(s) 418.  
 
Viking. HT. (Moro, 1968). “Volcano” x “Rouge Meilland”. Crimson, large, 12 cm/4.8 in. across, very double, fragrant, floriferous; growth vigorous, upright; foliage firm, deep green. (6.9)

Book  (1965)  
 
Viking HT w (Luciano Moro; int. Carlton, '63.) Volcano X Happiness. Very large, ovoid bud. Ruby red, large, high-centered, double blooms borne singly on long stems. Very good lasting quality; petals hang on. Moderate fragrance...