Population biological aspects of genetic control of the onion fly, Delia antiqua (Diptera; Anthomyiidae) / Giovanni ZurliniTranslocations and sex ratio distortion in the onion fly, Hylema antiqua (Meigen), and their relevance to genetic control / [by] L. VosselmanPopulation biological aspects of genetic control of the onion fly, Delia antiqua : (Diptera; Anthomyiidae) / door Giovanni Zurlini