. "Schmiedeknecht (1882-[1884])" . . . . "Schmiedeknecht (1882-[1884])" . "1882-[1884]"^^ . . "Schmiedeknecht, O. 1882-[1884]. Apidae Europaeae (Die Bienen Europas) per genera,species et varietates dispositae atque descriptae. Nomada, Bombus, Psithyrus et Andrena. 1. Berlin. 866 pp. [1-314 (1882) ; 315-550 (1883) ; 551-886 (1884)]." . "1882-[1884]"^^ .