@book {9783800118045, title = "Der Gärtner. Schritt für Schritt zur Gärtnerprüfung. Grundlagen", author = "Schrader, Karl AND Degen, Martin", isbn = "9783800118045", keywords = "Schulbuch Gartenbau", url = "http://www.content-select.com/index.php?id=bib_view&ean=9783800118045", url = "https://content-select.com/de/portal/media/view/519cc696-32fc-4eb1-bd4c-29115dbbeaba", publisher = "Verlag Eugen Ulmer", language = "ger", }