Literature references
1 literature reference for Oligonychus ulmi (Koch, 1836):
| Author: | Hirst, S. |
|---|---|
| Year: | 1920 |
| Title: | Revision of the English species of red spider (Genera Tetranychus and Oligonychus) |
| Source: | Proceedings of the Zoological Society of London, 4: 49-60 |