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The photographs are part of the Michigan Objective Prism Blue Survey, directed by Dr. Nancy Houk. The photographs are archived at the Astronomical Photographic Data Archive at the Pisgah Astronomical Research Institute. The photographs were taken with a 0.9 meter Schmidt telescope located at Cerro Tololo Inter-American Observatory near La Serena, Chile. A prism was installed at the front of the telescope to produce spectra of stars at the telescope's focal plane on the photograph. The photograph is a glass plate with blue sensitive emulsion. Most of these plates were taken from the late 1960's to the early 1980's.