00450nam a2200169Ia 4500008004100000020001500041082001700056100001800073245003700091260003400128300000800162650001700170650001600187653002500203653002700228653002500255170901s1975    xx            000 0 und d  a0837177170  a010.78bS39I  aSherrod, John 0aInformation Systems And Networks  aLondonbGreenwood Pressc1975  a200  aBibliography  aGneralities  aInformation networks  aInformation processing  aInformation services