Cook, Richard A. (1997). "Glen Echo". Glen Echo, Maryland & Cabin John Bridge. Archived from the original on August 13, 2022. Retrieved August 13, 2022.
Cook, Richard A. (1997). "The Town of Glen Echo, Maryland". Glen Echo, Maryland & Cabin John Bridge. Archived from the original on August 13, 2022. Retrieved August 13, 2022.
Cook, Richard A. (1997). "Glen Echo". Glen Echo, Maryland & Cabin John Bridge. Archived from the original on August 13, 2022. Retrieved August 13, 2022.
Cook, Richard A. (1997). "The Town of Glen Echo, Maryland". Glen Echo, Maryland & Cabin John Bridge. Archived from the original on August 13, 2022. Retrieved August 13, 2022.