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TitleDateType
26 Zion National Park Camp, rock quarry explosion1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942Image
27 Zion National Park Camp, rock screening and crushing plant1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942Image
28 Zion National Park Camp, sewer line in ditch1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942Image
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