Photographing manuscripts at the Vatican Library, ca. 1951-1958.
Developing microfilm at the Vatican Library, ca. 1951-1958.
Inspecting developed microfilm at the Vatican Library, ca. 1951-1958.
Splicing microfilm at the Vatican Library, ca. 1951-1958.
Printing positive microfilm at the Vatican Library, ca. 1951-1958.
Quality control of microfilm at the Vatican Library, ca. 1951-1958.
Arrival of microfilms in St. Louis, ca. 1951-1958.