National level bibliographic record--maps /
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| Format: | Government Document Reference Material |
| Language: | English |
| Published: |
Washington, D.C. :
Library of Congress : Distributed by Cataloging Distribution Service,
1986-
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| Subjects: |
| Item Description: | Update no. 2 supersedes the 1981 base text and Update no. 1. |
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| Physical Description: | 1 volume (loose-leaf) ; 28 cm |