TY - CPAPER AU - L. Roostalu AU - M. Vahter TI - SUSTAINABILITY PHENOMENA IN STRATEGIES OF ESTONIAN LANGUAGE FOR 2017-2020 AND FOREIGN LANGUAGES FOR 2009-2015 T2 - 5th International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM 2018 PY - 2018 SP - 555 EP - 562 DO - 10.5593/sgemsocial2018/3.6/S14.072 PB - STEF92 Technology ER -