| Authors(s) | Bedford, E.C.G. |
| Year | 1989 |
| Title | The biological control of the circular purple scale, Chrysomphalus aonidum (L.), on citrus in South Africa. Technical Communication, Department of Agriculture and Water Supply, South Africa No. 218: 1- 16. |
| Authors(s) | Bedford, E.C.G. |
| Year | 1989 |
| Title | The biological control of the circular purple scale, Chrysomphalus aonidum (L.), on citrus in South Africa. Technical Communication, Department of Agriculture and Water Supply, South Africa No. 218: 1- 16. |