00346nam a2200121 a 450000500170000002000150001708200170003210000210004924500480007026000390011830000260015749000410018320251203110040.0  a030611061X  a511.324bGON  aGoncharov,Sergei  aCountable Boolean Algebras and Decidability  aNew YorkbConsultants Bureauc1997  axii,318p.c23 cm H.B.  aSiberian school of algebra and logic