An edition of Sostoi︠a︡nie okruzhai︠u︡shcheĭ sredy i zdorovʹi︠a︡ naselenii︠a︡ g. Permi v 1999 g. (1999)

Sostoi︠a︡nie okruzhai︠u︡shcheĭ sredy i zdorovʹi︠a︡ naselenii︠a︡ g. Permi v 1999 g.

spravochno-informat︠s︡ionnye materialy

By V. G. Sumenkov