(N|KOSISTEMY W KRITI^ESKIH SOSTOQNIQH (B/s - (NpUZA^ENKO(B, (N`RIJ gEORGIEWI^s; (NiNSTITUT GEOGRAFII(B((NmOSKWA(B)s ((NmOSKWA (B:s (NnAUKA(B,s, 1989)
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Keywords: (N|KOLOGI^ESKIE SISTEMY (B- (NuSTOJ^IWOSTXs