00243nam a2200097Ia 4500008004100000082001700041100002000058245002600078260003100104300001000135260828b        |||||||| |||| 00| 0 eng d  a512bB452.NQ  aBelousov, V. D.  aN-ary quasi groupsb/  aKishinev:bShtintsa,c1972  a226p.