Literaturrecherche

Literatur Dirksmeyer W (2006) Economics of biological control in open field vegetable production - a methodological introduction. IOBC WPRS Bull 28(4):73-82

Literatur Dirksmeyer W, Waibel H, Belder E, Esbjerg P (2006) Comparison of pest control practices in open field vegetables among three European countries. IOBC WPRS Bull 28(4):83-99