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S73-31845 (3 Aug. 1973) --- Astronaut Jack R. Lousma, Skylab 3 pilot, studies a map of the U.S. during a Skylab EREP pass across the United States, as seen in this photographic reproduction taken from a television transmission made by a color TV camera aboard the Skylab space station in Earth orbit. EREP is an acronym for Earth Resources Experiments Package. Photo credit: NASA
