Flexible roof drill in operation underground in Waltham, Massachusetts, circa 1970s
MLA
United States. Department of Energy. "Flexible roof drill in operation underground in Waltham, Massachusetts, circa 1970s." Georgia State University. Special Collections. 1970/1979, http://digitalcollections.library.gsu.edu/cdm/ref/collection/mhross/id/102343.
APA
United States. Department of Energy (1970/1979). Flexible roof drill in operation underground in Waltham, Massachusetts, circa 1970s. Retrieved from http://digitalcollections.library.gsu.edu/cdm/ref/collection/mhross/id/102343
Chicago
United States. Department of Energy. "Flexible roof drill in operation underground in Waltham, Massachusetts, circa 1970s." 1970/1979. April 29, 2026. http://digitalcollections.library.gsu.edu/cdm/ref/collection/mhross/id/102343.
