External links
References
- CABI. (2004): Crop protection compendium. 2004 Edition. CAB International Publishing. Wallingford, UK.
- Olkowski, W.; Daar, S.; Olkowski, H. (1991): Common sense - pest control. The Taunton Press. USA.
- Olkowski, W.; Daar, S.; Olkowski, H. (1995): The gardener?s guide to common-sense pest control. The Taunton Press. USA.