"1928"^^ . . "Verity (1928)" . . . "Verity (1928)" . "1928"^^ . . "Verity, R. 1928. An essay on the origins of the geographical variations of the Rhopalocera in Europe exemplified by Melitaea aurinia, Rott. The Entomologist's record and journal of variation, 40(6): 86-91." . .