References below for Round the Clock I
Kazmaier, Horst: Sixty Years of Photography, pl. 195 there titled Advertisement for stockings, New York (I)
Cowan, Platinum, pl. 28
Twin Palms Publishers, Horst, p. 46
High Museum of Art, Chorus of Light: Photographs from the Sir Elton John Collection, p. 129
Taschen, 20th Century Photography, p. 273