00442nam a2200181Ia 4500008004100000041001200041082000800053082001100061100001800072100001100090245005600101260001500157260002400172260000900196300001500205365002500220650001500245150909s9999    xx            000 0 und d  aEnglish  a658  bDOU/MA  aDouglas E J    eAuthor  aManagerial economics: theory, practice and problems  aNew Jersey  bPrentice - Hall Inc  c1979  a505  Pages  aUSD.18.95             aManagement