TY  - BOOK
AU  -  Astanin,L.P.
AU  -  Blagosklonov,K.N.
TI  -  Conservation of nature / 
U1  -  333.95 
PY  - 1983///
CY  -  Moscow : 
PB  -  Progress Publishers, 
KW  -  Nature conservation
ER  -