00350nam a2200109Ia 450000500170000008000170001724500700003426000720010430000110017650000340018758300190022120260716043054.0  a08.15.02 I59  aToken-passing bus access method and physical layer specifications  bInstitute of Electrical and Electronics EngineersaNew YorkUSc1988  a238 p.  aAn American national standard  c3/7/00kM2LMGR