This collage is depicted on page 94 of Heidsieck's book, "ICI RADIO VERONA" (2009), that is held by the Sackner Archive. It should be noted that the images for this series of collages was scanned from Heidsieck's book that mostly rendered the image an exact copy of the Sackner work. However, in this print the upper five images of the power plugs are not registered correctly. All the power plugs have the same dark brown color as the ones beow these images. -- Source of annotation: Marvin or Ruth Sackner.