00267nam a2200097 a 450000500170000008200200001710000240003724500620006126000240012330000220014720251203090510.0  a658.84,bD, das  aDas, Ojha Ghanshyam  aOrganization and management of public distribution system  aDelhibMittalc1987  axii, 236p, 22 cm.