Republican competition of photographs "Unique places of the Republic of Mari El".Nomination "Nature of the Republic of Mari El"

Republican competition of photographs "Unique places of the Republic of Mari El".Nomination "Nature of the Republic of Mari El".- 2017. -605: Natural Wednesday of Russia Letter from the head Department of Environmental Safety, Environmental Management and Protection of the Republic of Mary El Karpova V.N.from 10/20/2017 № 5780-05-09..Electronic source: Department of Environmental Safety, Environmental Management and Protection of the Republic of Mari El