Entomologische Berichten

CC BY 3.0 NL ("Naamsvermelding")

Nederlandse Entomologische Vereniging

L.G. Moraal, & E.G. Steingröver. (1991). Ladybirds for biological control of Adelges cooleyi, in gas exchange experiments with Douglas-fir (Coleoptera: Coccinellidae; Homoptera: Adelgidae). Entomologische Berichten, 51(10), 136–138.