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3Published 2000Subjects: “...Energy conservation Juvenile films....”
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6Published 1998Subjects: “...Water conservation International cooperation....”
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9Published 1980Subjects: “...Architecture Europe Conservation and restoration....”
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10Published 1986Subjects: “...Books Conservation and restoration....”
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13Published 1978Subjects: “...Historic buildings Virginia Williamsburg Conservation and restoration....”
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14Published 1990Subjects: “...Architecture and energy conservation....”
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15Published 1994Subjects: “...Architecture and energy conservation....”
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17Published 1986Subjects: “...Architecture Europe Conservation and restoration....”
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18Published 1996Subjects: “...Agricultural conservation United States....”
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19Published 1975Subjects: “...Nature conservation United States....”
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