Primary parasitoid and hyperparasitoid guilds (hymenoptera) of grain aphid (Sitobion avenae F.) in northern Poland
Archives of Biological Sciences (2015) - Comment
doi: 10.2298/abs140915038b  issn: 0354-4664  issn: 1821-4339 

Tadeusz Barczak, Amelia Dębek-Jankowska, Janina Bennewicz