TY - JOUR TI - Holocene Isochrone Maps and Patterns of Tree-Spreading in the British Isles U1 - Essential JF - Journal of Biogeography AU - Birks, H. J. B. DO - 10.2307/2845208 UR - https://www-jstor-org.ezproxy.st-andrews.ac.uk/stable/2845208?seq=1#metadata_info_tab_contents PY - 1989 SP - 503 SN - 03050270 IS - 6 VL - 16 ER -