Proceedings.
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| Format: | Serial |
| Language: | English |
| Published: |
Washington.
[publisher not identified] ;
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| Subjects: | |
| Online Availability: |
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| Published: | v. 1- 1969- |
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| Item Description: | Each volume has also a distinctive title. |
| Physical Description: | volumes : illustrations ; 28 cm. |
| ISSN: | 0072-1409 |