a Mohammed,Imrana \a Development and Performance Evaluation of an Improved Hammer Mill for Crushing Kaolin into Different Sizes \h [Text] \c/by Imrana Mohammed - \a Zaria : \b Dept.of Mechanical Engineering,A.B.U. \c 2018 - \a xv,91leaves.: \b ill. \a Faculty of Engineering \a Includes bibliographical references LC Class. No.: \a HF 5415.5 Moh / \b 517181