@book{Dybvig:tspl4,
author = {R. Kent Dybvig},
title = {The {Scheme} Programming Language},
publisher = {{MIT} Press},
edition = {Fourth},
year = 2009,
texturl = "http://www.scheme.com/tspl4/",
annote = {Introduction and reference manual for R6RS Scheme with
numerous short and extended examples and exercises.}}