00284nam a2200109Ia 450000500170000008000170001710000160003424500470005026000430009730000150014058300190015520260716043036.0  a08.15.02 K73  aKnowles, T.  aStandards for open systems interconnection  bBSP Professional BooksaLondonGBc1987  aix, 388 p.  c3/7/00kM2LMGR