000 00256nam a22001097a 4500
082 _a363.6
_bBEL/C
100 _aBelyaev,V I.
245 _aControl of natural environment
260 _aKiev
_bNaukova dumka publishers
_c1975
300 _a129p.
942 _cBK
999 _c504348
_d504348