Ėkologicheskai͡a bezopasnostʹ strany -- uslovie vyzhivanii͡a nat͡sii
By: Egorova Li͡udmila
Publisher: s. n.
Published: 1999
Place of publication: Russia
Language: rus
Number of pages: 26
Subjects: Environmental conditions
Notes: Electronic copy available http://www.eco.nw.ru/lib/data/10/04/010410.htm