00297nam a2200109Ia 4500008004100000040003800041100001400079245002100093260004200114300001500156653001600171211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aCohn, P M 0aLinear equations  bRoutldge and kegan PaulaLondonc1958  aviii,74 p.  aMathematics