Hartman, C. A., Ackerman, J. T., Herzog, M. P., Wang, Y., & Strong, C. (2018). Evaluation of Social Attraction Measures to Establish Forster's Tern (Sterna forsteri) Nesting Colonies for the South Bay Salt Pond Restoration Project, San Francisco Bay, California--2017 Annual Report. United States Department of the Interior. Geological Survey. Open-File Report, i. https://doi.org/10.3133/ofr20181090

Hartman, C. Alex, Joshua T. Ackerman, Mark P. Herzog, Yiwei Wang, and Cheryl Strong. "Evaluation of Social Attraction Measures to Establish Forster's Tern (Sterna Forsteri) Nesting Colonies for the South Bay Salt Pond Restoration Project, San Francisco Bay, California--2017 Annual Report." United States Department of the Interior. Geological Survey. Open-File Report 2018: i. https://doi.org/10.3133/ofr20181090.

Hartman, C. Alex, et al. "Evaluation of Social Attraction Measures to Establish Forster's Tern (Sterna Forsteri) Nesting Colonies for the South Bay Salt Pond Restoration Project, San Francisco Bay, California--2017 Annual Report." United States Department of the Interior. Geological Survey. Open-File Report, 2018, p. i, https://doi.org/10.3133/ofr20181090.