Photographer's red 32, Via Sardegna, Roma stamp and number 7174 in blue crayon on the verso
Peter Weiermair, 1993, Guglielmo Plüschow. Erotische Photographien, (Cologne), ill. p. 89.
Volker Janssen (ed.), 1991, Wilhelm von Gloeden. Wilhelm von Plüschow, Vincenzo Galdi, (Berlin), ill. p. 41.
