(Nu^ENYE(B-(NISSLEDOWATELI VIWOJ PRIRODY (B:s (NpOSOBIE DLQ U^ITELEJ BIOLOGII SREDNIH OB]EOBRAZOWATELXNYH [KOL (B/s - (NwWEDENSKAQ(B, (NeLENA gEORGIEWNAs; (NbELOWA[INA(B, (NnINA mIHAJLOWNAs; (NoSTRQKOWA(B, (NgRAFIRA aLEKSANDROWNAs; (NqROSLAWSKIJ GOSUDARSTWENNYJ PEDAGOGI^ESKIJ INSTITUT IM(B. (Nk(B.(Nd(B. (Nu[INSKOGOs ((NqROSLAWLX (B:s (Nb(B. (NI(B.,s, 1973)
(NwYP(B. 1 (1973; 104 (NS(B.)s
Keywords: (NbIOLOGIQs -- (NmETODI^ESKIE POSOBIQs