The American Heritage dictionary of the English language. - 4th ed. - Boston : Houghton Mifflin, c2006. - xxxvii, 2074 p. : col. ill. ; 29 cm. ISBN: 9780618701728 LCCN: 2006618466 Subjects--Topical Terms: English language--Dictionaries. LC Class. No.: PE1628 / .A623 2006