Hunter, Eric J. Classification made simple: an introduction to knowledge organisation and information retrieval - 3rd ed. - Farnham, Surrey : Ashgate, c2009. - viii, 163 p. : ill. ; 22 cm. includes bibliography and index ISBN: 978-0-7546-7558-7 (pbk.) Subjects--Topical Terms: LC Class. No.: Z696.A4 H86