Thal Jonas Educational employee Name T.J. Jonas Telephone 071 5278517 E-mail t.j.jonas@hortus.leidenuniv.nl Educational employee Faculty of Science Hortus Botanicus HB Education Work address Hortus botanicus Rapenburg 73 2311 GJ Leiden Contact 071 5278517 t.j.jonas@hortus.leidenuniv.nl stichting Vrienden van het Singelpark educatie Thalents Leiden Educatie Share on Facebook Share by Bluesky Share on LinkedIn Share by WhatsApp Share by Mastodon