Gardener, Mark. The Essential r reference / Mark Gardener. - 1st ed. - Indianapolis, IN : Wiley Pub., Inc., 2012. - 554 p. 24 cm. ISBN: 9781118391419 (pbk. : alk. paper) 1118391411 (pbk. : alk. paper) LCCN: 2012948918 Subjects--Topical Terms: EssentialReference Dewey Class. No.: 016.36