Gregory J. Markopoulos
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1998documentary1998Documentary, Robert Beavers, Gregory J. Markopoulos
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1997
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1975short filmdocumentary1975Documentary, Gilbert Proesch, George Passmore
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1971
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1970
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1969documentary1969
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1968
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1967
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short filmdocumentary1967Documentary, Mark Turbyfill
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1966documentary1966
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1964short filmdocumentary1964
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1958
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1951
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1950
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1949
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