Mon, 25 May 1998 21:16:03 +0200 wenzelm certify_term: type_check replaces Term.type_of, providing sensible
Mon, 25 May 1998 21:14:00 +0200 wenzelm renamed state_source to source';
Mon, 25 May 1998 21:13:20 +0200 wenzelm added recover, source;
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