Nature Monument "Valley of the Popovka River" (St. Petersburg) [6]

Nature Monument "Valley of the Popovka River" (St. Petersburg) [6] / Ladygin A.V. - 2016. -605: Territory 605: St. Petersburg 605: natural wealth of Russia;Filming date: October 2016..Source of an electronic copy: Directorate of specially protected natural territories of St. Petersburg