(NpRIRODNYE \KOSISTEMY DELXTY wOLGI (B:s ((NsBORNIK NAU^NYH TRUDOW(B) /s - (NwINOGRADOW(B, (Nw(B.(Nw(B.s; (NkRIWONOSOW(B, (Ng(B.(Na(B.s ((NlENINGRAD (B:s (Nb(B. (NI(B.,s, 1984)
(NgEOGRAFI^ESKOE OB]ESTWO sssrs
Keywords: (N|KOLOGI^ESKIE SISTEMYs