000 00258nam a2200097 4500
245 _aWorld of man in the world of nature
_cby I. Laptev
100 _aLaptev, I.
260 _aMoscow
_bProgress Publishers
_cc1979
300 _a248p. ; 20cm.
082 _a301.31
_b LAP
999 _c65699
_d65699