a Nwosibe, Patrick Ogbonna \a Upgrading of Nigerian Bitumen Using Zeolite-Y Based Catalyst \h [Text] \c by Patrick Ogbonna Nwosibe - \a Zaria: \b Dept. of Chemical Engineering, ABU \c 2021 - \a xiii,64leaves.: \b ill. \a Faculty of Engineering LC Class. No.: \a TP 156.C35 Nwo / \b 512293