OECD Compendium of Productivity Indicators 2018. Paris : OECD, 2018. 137 s. OECD Compendium of Productivity Indicators. Available on Internet: <https://www.oecd-ilibrary.org/economics/oecd-compendium-of-productivity-indicators-2018_pdtvy-2018-en> ISBN 978-92-64-30111-5. [Copy count : 1, currently available 0, at library only 1]