@book {9783818612610, 
	title = "Sachkundenachweis Pflanzenschutz",
	author = "Klein, Wilhelm AND Grabler, Werner AND Tischner, Helmut",
	isbn = "9783818612610",
	edition = "18",
	url = "http://www.content-select.com/index.php?id=bib_view&ean=9783818612610",
	url = "https://content-select.com/de/portal/media/view/5fff1b45-14dc-4d08-aeb5-678cb0dd2d03",
	publisher = "Verlag Eugen Ulmer",
	language = "ger",
}