Ussery, E. N., Yngve, L., Merriam, D., Whitfield, G., Foster, S., Wendel, A., & Boehmer, T. (2016). The National Environmental Public Health Tracking Network Access to Parks Indicator: A National County-Level Measure of Park Proximity. J Park Recreat Admi.

Ussery, Emily Neusel, Leah Yngve, Dee Merriam, Geoffrey Whitfield, Stephanie Foster, Arthur Wendel, and Tegan Boehmer. "The National Environmental Public Health Tracking Network Access to Parks Indicator: A National County-Level Measure of Park Proximity." J Park Recreat Admi 2016.

Ussery, Emily Neusel, et al. "The National Environmental Public Health Tracking Network Access to Parks Indicator: A National County-Level Measure of Park Proximity." J Park Recreat Admi 2016.