found: Work cat.: Hourant, Roger. L'usage du carnet de bal en Wallonie, 2000.
found: Dance Card Museum WWW site, Sept. 5, 2001(dance cards served two purposes: to be used at the dance to list in order the dances of the evening and to be kept as a memento of the Ball)
found: OED On-line(ball-book; U.S. dance-card)
found: Emily Post's Etiquette, 1922:chap. XVII, paragraph 59 ("dance card" or programme (still in vogue at public balls) that allotted a certain dance to a certain gentleman and lady equally)
