Anders, YvonneYvonneAndersRoßbach, Hans-GüntherHans-GüntherRoßbachTietze, WolfgangWolfgangTietze2022-02-112022-02-1120162288-6729https://fis.uni-bamberg.de/handle/uniba/53226engMethodological challenges of evaluating the effects of an early language education programme in Germanyarticle10.1186/s40723-016-0025-3