source_documents: 13

The program file or page each row was read from.

This data as json

rowid	id	year	kind	url	rights
13	wayback-98-program-hh.html	1998	html	https://web.archive.org/web/20010124201100id_/http://www.ncte.org:80/cccc/98/program/hh.html	NCTE; Wayback Machine replay, private capture