Crowhurst Lennard & Lennard 1995, p. 7. Crowhurst Lennard, Suzanne H.; Lennard, Henry L. (1995). Livable cities observed: a source book of images and ideas for city officials, community leaders, architects, planners and all other committed to making their cities livable. Gondolier Press. ISBN978-0935824056. LCCN94-075057.