http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Classification of Xylotini (Diptera, Syrphidae)
HIPPA,Heikki: -- Classification of Xylotini <Diptera,Syrphi- -- dae>. - Helsinki:Finnish Zoolog.Publ.Board -- 1978. 153 S.m.58 Fig. 8° -- (Acta zoologica Fennica.156.) -- 1980! -- Ts.