How to differentiate Dutch elm disease from elm phloem necrosis.
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| Corporate Author: | |
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Broomall, PA :
United States Department of Agriculture, Forest Service,
1981.
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| Series: | NA-FB/P ;
11. |
| Subjects: |
| Physical Description: | 1 folded sheet (9 pages) : illustrations (some color) ; 23 cm. |
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| Action Note: | committed to retain |