Nollmeyer, G. E. ., Kelting-Gibson, L. . and Graves, C. J. . (2016) “Mapping the Domain of Subject Area Integration: Elementary Educators’ Descriptions and Practices”, International Journal of Learning, Teaching and Educational Research, 15(9), pp. 1–27. Available at: http://www.ijlter.myres.net/index.php/ijlter/article/view/891 (Accessed: 4 August 2026).