AUTHOR=Markgraf Vera TITLE=First Pollen Record in South America. Commentary: Die Zeichenschrift der Pollenstatistik JOURNAL=Frontiers in Earth Science VOLUME=4 YEAR=2016 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2016.00100 DOI=10.3389/feart.2016.00100 ISSN=2296-6463