00813nam0-22002651i-450-990001177170403321000117717FED01000117717(Aleph)000117717FED0100011771720000920d1987----km-y0itay50------baengCommutator theory for congruence modular varietiesby FREESE RALPH.Cambridge [etc.]Cambridge University Press1987London Mathematical Society lecture note series125Freese,Ralph55714McKenzie,RalphITUNINARICAUNIMARCBK990001177170403321C-9-(1253599MA1MA1Commutator theory for congruence modular varieties341993UNINAING01