00346nam a2200133Ia 4500008004100000020001500041082001900056100001900075245003400094260003800128300000800166650001900174650001900193140316s9999    xx            000 0 und d  a8170296277  a004.21bSKI/IN  aSkidmore,steve  aIntroduction systems analysis  aNew DelhibBPB Publicationsc1995  a196  aFact gathering  afact modelling