@article {10.3262/ZP1101136, 
	author = "Terhart, Ewald",
	title = "John, Hattie: Visible Laerning. A Synthesis of over 800 Meta-Analyses relating to Achievement (Ewald Terhart)",
	journal = "Zeitschrift für Pädagogik",
	ISSN = "0044-3247",
	year = "2011",
	number = "01",
	pages = "136-140",
	doi = "10.3262/ZP1101136",
	url = "https://content-select.com/index.php?id=bib_view&doi=10.3262%2FZP1101136",
	publisher = "Beltz Juventa",
	language = "",
}