AUTHOR=Friedrich Bretislav, Herschbach Dudley, Schmidt-Böcking Horst, Toennies Peter TITLE=An International Symposium (Wilhelm and Else Heraeus Seminar # 702) Marked the Centennial of Otto Stern's First Molecular Beam Experiment and the Thriving of Atomic Physics; A European Physical Society Historic Site Was Inaugurated JOURNAL=Frontiers in Physics VOLUME=7 YEAR=2019 URL=https://www.frontiersin.org/articles/10.3389/fphy.2019.00208 DOI=10.3389/fphy.2019.00208 ISSN=2296-424X