The document "Generic extendable heaps for Common Lisp" (CDR 12) has been withdrawn. According to the CDR process, we now only list the title of the document and indicate the withdrawn status for the records.
-- Pascal Costanza
A tangential comment:
If this CDR is ever resumitted, I suggest the title should be revised. The word "heap" is heavily overloaded with other meanings in Lisp technology. Its here use misled me initially.