LOCKLEY Steven W Sleep : a very short introduction / Steven W Lockley and Russell G.Foster. - Oxford : Oxford Uni Press , 2012. - xvi , 146 pages : ill ; 18 cm - Very short introductions ; Vol.295 . Includes bibliographical references and index. ISBN: 9780199587858 (pbk.) : GBP7.99 Subjects--Topical Terms: SLEEP