000 00281nam a2200109Ia 45e0
008 181001s1968 xx 000 0 und d
100 _aTretyakov A.
245 0 _aConcrete and converting
260 _aMascow
_bMir Pub.
_c1968
300 _a312
942 _2ddc
_cBK
999 _c2200
_d2200