| Unidentified photographer K.K . Grapische Lehr - und Versuchsanstalt Wien studios 1906 Photograph Internet - Original source ill-defined ????????-???????? (Amateur Photographer) 1906, no. 09, p. 276
I'm indebted to Bálint Flesch for bringing this to my attention (16 July 2020) LL/102541
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