Wed, 14 Sep 1994 16:05:39 +0200 wenzelm replaced lookup_const by Sign.const_type;
Wed, 14 Sep 1994 16:02:06 +0200 wenzelm now uses Sign.const_type;
Wed, 14 Sep 1994 14:49:56 +0200 wenzelm letrec syntax: replaced "id" by "idt";
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