"Making+Faded+Chalk+in+an+Old+Photo+Album+Visible+-+Association+for+Library+Collections+&+Technical+Services+(ALCTS)", American Library Association, dynamically generated page.
http%3A%2F%2Fwww.ala.org%2Falcts%2Fpreservationweek%2Fadvice%2Fchalk (Accessed April 25, 2024)
