Martinek, V. 1991. An outbreak of the web-spinning sawfly Cephalcia arvensis Panz (Hym, Pamphiliidae) in eastern Bohemia. Lesnictvi (Prague) 37:543-570.
Martinek, V. 1991. An outbreak of the web-spinning sawfly Cephalcia arvensis Panz (Hym, Pamphiliidae) in eastern Bohemia. Lesnictvi (Prague) 37:543-570.