1. U.S. National Academies of Sciences Engineering and Medicine, Microbiomes of the Built Environment: A Research Agenda for Indoor Microbiology, Human Health, and Buildings,2017
2. Characteristics of Public and Private Elementary and Secondary School Teachers in the United States: Results from the 2011-12 Schools and Staffing Survey;Goldring,2013
3. Final Report on International Comparison of Educational Programs and Instruction Days and Hours;Paek,2013
4. Education at a Glance 2018;The Organization for Economic Co-operation and Development OECD,2018