Who Were the Mayas? M. Jakeman, Wells. "Who Were the Mayas?" Improvement Era 43, no. 2 (1940): 78-79, 117, 119-120.
An Expedition to Central America M. Jakeman, Wells. "An Expedition to Central America." Improvement Era 53, no. 2 (1950): 112-114, 144-147.
The Time Perspective in Ancient Mexico and Central America M. Jakeman, Wells. "The Time Perspective in Ancient Mexico and Central America." Improvement Era 46, no. 8 (1943): 470-471, 504-505.
