00401nam a2200145Ia 4500008004100000082001700041100001700058245004600075260005400121300000800175650001400183650002000197653001400217653002400231170901s1969    xx            000 0 und d  a330.18bS28E  aTheil, Henri 0aEconomic Analysis and Operations Research  aAmsterdambNorth Holland Publishing Companyc1969  a478  aEconomics  aSocial sciences  aEconomics  aOperations research