Book  (1940)  Page(s) 5.  
 
Aldous, J., Iowa City, Iowa [breeder of 'Chicago']

Book  (1936)  Page(s) 153.  
 
Cicago (HT) Aldous 1928; sport of Premier; soft mallow-pink, very large, double, globular, lasting, fragrance 7/10, floriferous, large globular buds, long strong stems, no prickles, growth 7/10, upright.

Article (misc)  (1929)  Page(s) 218.  
 
Chicago Hybrid Tea (J. Aldous, Iowa City, Iowa, 1928.) Sport of 'Premier'. Type, 'Baroness Rothschild'... soft mauve-pink (color 'Daybreak' carnation)