V. Gromov.The results of observations on the development of vegetation in the mountains.Kozmodemyansk and its environs, 1864.

V. Gromov.The results of observations on the development of vegetation in the mountains.Kozmodemyansk and its environs, 1864.- 1864. -Agreement No. 24 of 02/12/2016 category 14 of the manuscript of the works of members of the Russian Geographical Society and separate documents on the Yekaterinoslav province, case 22..Electronic copy source: PB