1. ASTM D1883. 2016. Standard test method for California bearing ratio of laboratory-compacted soils, American Society for Testing and Materials, West Conshohocken, PA, USA.
2. ASTM D4429a. 2009. Standard test method for california bearing ratio of soils in place, American Society for Testing and Materials, West Conshohocken, PA. USA.
3. ASTM D6951/D6951M. 2018. Standard test method for use of the dynamic cone penetrometer in shallow pavement applications, American Society for Testing and Materials, West Conshohocken, PA, USA.