https://www.heidelbergmaterials-northerneurope.com/sites/default/files/2023-08/HMNE%20GPC%20-%20General%20Purchasing%20Conditions%202023%20%28Eng%29.pdf 2023-08-10T09:46:20+02:00 https://www.heidelbergmaterials-northerneurope.com/sites/default/files/assets/document/5c/af/heidelbergcement-sustainability-report-2020.pdf 2022-03-21T17:17:25+01:00 https://www.heidelbergmaterials-northerneurope.com/system/files/2025-11/Heidelberg%20Materials%20Northern%20Europe%20Supplier%20Code%20of%20Conduct%20sv.pdf 2025-11-04T13:45:01+01:00