(NkARTOGRAFI^ESKIE ISSLEDOWANIQ PROBLEMY OHRANY OKRUVA@]EJ SREDY (B:s ((NwOPROSY TEORII(B) /s - (NzOLOWSKIJ(B, (NaNDREJ pETROWI^s; (NpARHOMENKO(B, (NgALINA oRESTOWNAs; (NmEVDUNARODNAQ KARTOGRAFI^ESKAQ KONFERENCIQs 1980; (NqPONIQ(B)s ((NkIEW (B:s (NnAUK(B. (NDUMKA(B,s, 1980)
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Keywords: (NoHRANA OKRUVA@]EJ SREDY (B- (NkARTOGRAFI^ESKIE METODYs