Education at a Glance 2018 : OECD Indicators. Paris : OECD, 2018. 458 s. Available on Internet: <https://read.oecd-ilibrary.org/education/education-at-a-glance-2018_eag-2018-en#page1> ISBN 978-92-64-30338-6. [Copy count : 1, currently available 0, at library only 1]