1. MSHA (2015b) Program policy letter P15-V-01 examination of working places. Retrieved October 15, 2019, from https://www.msha.gov/p15-v-01
2. Examinations of Working Places in Metal and Nonmetal Mines, 81 FR 36818 (2016) Federal Register: The Daily Journal of the United States
3. Examination of working places ((2019)) 30 CFR §§ 56/57.18002
4. Definitions (2015) 30 CFR §§ 56/57.2
5. Willmer DR (2017) Exploring the use of situation awareness in behaviors and practices of health and safety leaders. Trans Soc Min Metall Explor Inc 342(1):36–42