00309nam a2200133Ia 4500008004100000040001600041041001200057082001500069100001700084245001900101250001200120260003200132300001100164230917s9999||||xx |||||||||||||| ||und||  e11042aMAIN  aEnglish  a070.1 E36C  aEmery, Edwin 0aCommunications  a4th ed.  aNew YorkbDonald Meadc1973  a464 p.