on a voluntary basis . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/on%20a%20voluntary%20basis/1/eng (30.08.2026)
on a voluntary basis . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/on%20a%20voluntary%20basis/1/eng (30.08.2026)