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11por Library of Congress .“…Library of Congress . Geography and map Division. Reference Department…”
Publicado 1964
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12
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13por Library of Congress .“…Library of Congress . Office for Descriptive Cataloging Policy…”
Publicado 1981
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14
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15
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16por Library of Congress (“…Library of Congress ( Rare Book and Special Collections Division…”
Publicado 1992
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19por Library of Congress“…Library of Congress Bibliography and Reference Correspondence Section…”
Publicado 1964
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20por Library of Congress“…Library of Congress General Reference and Bibliography Division…”
Publicado 1945
Libro