"Karl Fedorovich Kessler (19 November 1815 \u2013 3 March 1881) was a German-Russian zoologist and author of zoological taxa signed Kessler, who was mostly active in Kiev, Ukraine and conducted most of his studies of birds in Ukrainian regions of the Russian Empire - Kiev Governorate, Volyn Governorate, Kherson Governorate, Poltava Governorate and Bessarabia."@en . "1881-03-03Z"^^ . "Kessler, Karl Fedorovich"@en . "1815Z"^^ . . . "1815-11-19Z"^^ . "Ukrainian scientist" . "1881Z"^^ .