Exercise 1.40 in Common Lisp
Exercise 1.40 in Emacs Lisp
Exercise 1.41 in Clojure
Exercise 1.41 in Guile Scheme
Exercise 1.41 in Common Lisp
Exercise 1.41 in Emacs Lisp
Exercise 1.42 in Clojure
Exercise 1.42 in Guile Scheme
Exercise 1.42 in Common Lisp
Exercise 1.42 in Emacs Lisp