Book  (Apr 1993)  Page(s) 416.  
 
Oberleutnant Immelmann Hybrid Tea, soft yellowish pink, center deeper, 1936, Henniger...

Website/Catalog  (1938)  Page(s) 8.  
 
Recent German and Foreign Cultivars:
Oberleutnant Immelmann H.T. (W. Henniger 36) Quite large bloom, moderately full, round, petals reflexed towards the inside, somewhat ruffled, delicate yellowish pink; center stronger and deeper pink; lasting when cut. Group and decoration rose, floriferous, upright.

Book  (1936)  Page(s) 359.  
 
Immelmann, Oberleutnant (HT) Henniger 1916; delicate light pink, whitish reflexes, large, double, solitary, upright long stems, fragrance 6/10, growth 6/10