https://www.efecon.tuiasi.ro/en/research-article-en-2/multi-purpose-use-of-caustobioliths-of-carbonic-series-based-on-innovative-coal-chemistry-technologies-in-the-far-east-of-russia/ EFECON Sat, 09 Sep 2023 12:59:28 +0000 hourly 1 https://wordpress.org/?v=6.1.1