00321nam a2200097Ia 4500080001700000245007000017260007200087300001100159500003400170583001900204  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