Bassuk, N., B. Denig, B. Neal, Y. Harada. 2018. The state of the elms on the National Mall, Washington, DC. Report prepared for the National Park Service. DOI: 10.13140/ RG.2.2.21315.91680 http://www.hort.cornell.edu/uhi/research/articles/National%20Mall%20Elms_2018.04.07.pdf (Publication)