"Safely+Cleaning+a+Tombstone+-+Association+for+Library+Collections+&+Technical+Services+(ALCTS)", American Library Association, dynamically generated page.
http%3A%2F%2Fwww.ala.org%2Falcts%2Fpreservationweek%2Fadvice%2Ftombstone (Accessed April 23, 2024)
