Author talk:Paul W Roder
Sources edit
Works information sourced from copyright renewal scans at : http://shelf1.library.cmu.edu/Projects/crr/1973/1973-7-3645.tif - Page 3645) —unsigned comment by Billinghurst (talk) .
Works information sourced from copyright renewal scans at : http://shelf1.library.cmu.edu/Projects/crr/1973/1973-7-3645.tif - Page 3645) —unsigned comment by Billinghurst (talk) .