00301nam a2200097Ia 4500008004100000082001800041100001600059245008500075260003000160300001300190260313b        |||||||| |||| 00| 0 eng d  a658bSp742.EI  aSpeight, H.  aEconomics and industrial efficiencyb: an introduction to managerial economics /  aLondon:bMacmillan,c1970  ax, 266p.