(NoPREDELITELX PTIC kALININSKOJ OBLASTI (B/s - (NsOROKIN(B, (Nms; (NkALININSKIJ GOSUDARSTWENNYJ UNIWERSITETs ((NkALININ (B:s (Nb(B. (NI(B. ,s, 1973)
Keywords: (NpTICYs; (NzOOLOGIQs