00342pam a2200145a 44500008004100000020000900041041001200050082000900062100002000071245003800091250000600129260004400135300000800179650000900187230515b1992    xxu||||| |||| 00| 0 eng d  aNULL  aENGLISH  aN.D.  aHancock John C.  aPrinciples Of Communicaton Theory  a0  aNULLbTata McGraw Hill Publishingc1992  a253  aNULL