Heavy metals, especially lead, deposition recorded in an ombrotrophic peat bog near Manchester, United Kingdom G. Le Roux, D. Weiss, A. Cheburkin, N. Rausch, J. Grattant, M. Krachler et W. Shotyk J. Phys. IV France, 107 (2003) 739-742 DOI: 10.1051/jp4:20030407