Ignall, Edward., Linear programming models of crew assignments for refuse collection / Edward Ignall, Peter Kolesar, Warren Walker. - iii, 21 pages ; 28 cm - The Rand paper series ; P-4717 . - Rand paper series ; P-4717 . Includes bibliographical references (page 21) ISBN: Hadiah Subjects--Topical Terms: Refuse and refuse disposal--Mathematical models.