Some beneficial insects
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
London,
H.M. Stationery Off.,
1939.
|
| Edition: | [4th ed.] |
| Series: | Bulletin (Great Britain. Ministry of Agriculture, Fisheries and Food)
no. 20. |
| Subjects: |
| Physical Description: | v, 26 p. 2 col. plates. |
|---|