Max Wolf and Joh. Palisa, ‘Photographische Sternkarten (April 24, 1901)’, April 24-1901, National Gallery of Art, Washington, D.C.
image: 27.8 x 21.8 cm (10 15/16 x 8 9/16 in.)  sheet: 36 x 25.4 cm (14 3/16 x 10 in.)