00569cam a2200181 a 450000500170000000800410001703500110005804000290006908200180009810000350011624500730015124600220022426000420024630000150028865000190030365000320032265000330035420181210001544.0820810s1964    enk    g      000 0 eng d  a713471  aD2035bengcD2035dABN:104a384bMCU 19641 aMcLuhan, Marshall,d1911-1980.10aUnderstanding media :bthe extensions of man /cby Marshall McLuhan.3 aExtensions of man  aLondon :bRoutledge & K. Paul,c1964.  avii, 359p. 0aCommunication. 0aMass mediaxSocial aspects. 0aTechnology and civilization.