MÜHL, Gerald. What Contribution can Regional Planning Capable Make to the Implementation of a „Sustainable” Approach to Securing the Supply of Raw Materials? The example of sand and gravel. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 57, n. 4, p. 273–283, 1999. DOI: 10.14512/rur.1097. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1097. Acesso em: 15 aug. 2026.