Merrill, Robert H., 1881-1955, “Mexico km 43 Iztaccihuatl & Popo,” Digital Collections, accessed December 8, 2025, https://digitalcollections.library.gvsu.edu/document/49701.
Black and white photograph of a tree-covered mountain. The photographer is standing on a mountainside with a trench visible on the left of the frame with small trees and shrubs covering the area in front of them.