OECD Handbook for Internationally Comparative Education Statistics 2018 : Concepts, Standards, Definitions and Classifications. Paris : OECD, 2018. 147 s. Available on Internet: <https://www.oecd-ilibrary.org/education/oecd-handbook-for-internationally-comparative-education-statistics-2018_9789264304444-en> ISBN 978-92-64-30443-7. [Copy count : 1, currently available 0, at library only 1]