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[Baltimore, MD] : [Washington, DC] : [Paris, France] : [Garching, Germany] : Space Telescope Science Institute ; NASA ; European Space Agency ; Space Telescope European Coordinating Facility, 1996
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Washington, DC : U.S. Dept. of Education, Office of Educational Research and Improvement, Programs for the Improvement of Practice : For sale by the U.S. G.P.O., Supt. of Docs., 1992
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