New species of North American bees of the genus Dufourea (Hymenoptera, Halictidae) with descriptions of two previously undescribed females /
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
The Administration,
1980.
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| Series: | Technical bulletin (United States. Department of Agriculture) ;
no. 1618. |
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| Item Description: | "Issued September 1980"--Title page verso. |
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| Physical Description: | 21 pages ; 26 cm. |