Parasites of the birch leaf-mining sawfly (Phyllotoma nemorata)
- Source:
- Technical bulletin (United States. Dept. of Agriculture) ; no. 757 1941
- Year:
- 1941
- Subject:
- Birch leaf-mining sawfly -- Biological control and Parasitic insects
- Format:
- 56 p. : ill. ; 23 cm.
- Publisher:
- U.S. Dept. of Agriculture
- Collection:
- Organic Roots Collection