Stable (206Pb, 207Pb, 208Pb) and radioactive (210Pb) lead isotopes in 1 year of growth of Sphagnum moss from four ombrotrophic bogs in southern Germany: geochemical significance and environmental implications - Shotyk, William; Kempter, Heike; Krachler, Michael (Geochimica et cosmochimica acta, 2015)