OECD (2021), "86 Railway or tramway locomotives, rolling-stock, parts, fixtures and fittings; signalling etc.: Norway: Harmonised System 2012", in International Trade by Commodity Statistics Volume 2020 Issue 5: Estonia, Israel, Latvia, Lithuania, Netherlands, Norway, Poland, OECD Publishing, Paris, https://doi.org/10.1787/1b592e08-en.