This looks like an almost expression-by-expression clone of: https://www.kylheku.com/cgit/lisp-snippets/tree/refs.lisp https://www.kylheku.com/cgit/lisp-snippe

This looks like an almost expression-by-expression clone of: https://www.kylheku.com/cgit/lisp-snippets/tree/refs.lisp https://www.kylheku.com/cgit/lisp-snippets/tree/refs.lisp [2012-01]