1. Stone (crushed);Willett,2021
2. Wherefore art thou aggregate resources for highways?;Meininger;Publ. Roads,2011
3. Aggregate Resource Availability in the Conterminous United States, Including Suggestions for Addressing Shortages, Quality, and Environmental Concerns, Report 2011–1119;Langer,2011
4. Looking to aggregates to improve pavement sustainability;Meininger;Publ. Roads,2021
5. Sand and Sustainability: Finding New Solutions for Environmental Governance of Global Sand Resources;United Nations Environment Programme,2019