Sheldon, Christopher Environmental management systems : a step-by-step guide to implementation and maintenance / Christopher Sheldon and Mark Yoxon - 3rd ed. - London : Earthscan, 2006 - xiv, 280 p. : ill. ; 25 cm. Rev. ed. of : Installing environmental management systems. Rev. ed. 2002 ISBN: 9781844072576 (alk. paper) 1844072576 (alk. paper) RM102.98 Subjects--Topical Terms: Environmental management