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|Material Type:||Government publication, National government publication|
|All Authors / Contributors:||
George H Vansell; United States. Department of Agriculture.
Contribution from the Bureau of Entomology and Plant Quarantine in cooperation with the University of California.
|Description:||32 pages : illustrations, 1 map ; 24 cm.|
|Series Title:||Circular (United States. Department of Agriculture), no. 650.|
|Responsibility:||by Geo. H. Vansell.|