Josef Maria Eder (1855-1944) & Eduard Valenta (1857-1937), 1896, Versuche über Photographie mittelst der Röntgen'schen Strahlen, (Vienna: K. Lechner / W. Muller). The books contains photogravures.
The Metropolitan Museum of Art, New York, has a copy of this portfolio (Accession Number: 2011.66.1-.15).