Fri, 28 Jun 1996 11:19:56 +0200 paulson Updated reference to Slinds paper on TFL
Fri, 28 Jun 1996 11:16:12 +0200 paulson Now set_cs is just taken from !claset
Fri, 28 Jun 1996 11:13:07 +0200 paulson Added type-checking to rule "combination". This corrects a fault
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