Annual <i>δ</i>¹⁸O_DW-VSMOW values estimated using Online Isotopes in Precipitation Calculator (OIPC [115]) and <i>δ</i>¹⁸O_P-VSMOW ratios measured for skeletal tissues of humans from prehistoric and early historic sites in Poland and north-eastern Germany discussed in this study (reported as <i>δ</i>¹⁸O_P-VSMOW or calculated from <i>δ</i>¹⁸O_C-VPDB values).

δ18ODW values for humans calculated from measured δ18OP-VSMOW and δ18OC-VPDB values. In case of humans O isotope composition was measured in single samples of enamel, except the individual from Kowal, for whom enamel, dentin and bones samples were analysed. Location of Tollense after [145], simplified.