000 00221nam a22001097a 4500
082 _a335.412 MAR
100 _aMARX
245 _aMARX
260 _aMOSCOW
_bPROGRESS PUBLISHERS
_c1947
300 _a54p.
_b20cm
942 _cBK
999 _c19677
_d19677