Bok Impact of pollution at a stone age rock art site in Oslo, Norway, studied using lead and strontium isotopes. Åberg, G.; Stray, H.; Dahlin, E. Publikasjonsdetaljer Tidsskrift: J. Archaeol. Sci., 26, 1483–1488, 1999 DOI: 10.1006/jasc.1999.0445