000 00314nam a22001331a 4500
082 _a508
_bENG/D
100 _aFrederick Engels
245 _aDialectics of nature/
_cby Frederick Engels
260 _aMoscow:
_bProgress,
_c1986.
300 _a403p.
650 _aNatural Science
650 _aScience
942 _cBK
999 _c10675
_d10675