a Abdullahi, Sani Gumel <br/><br/>
\a Effect of Cooperative Learning on Chemistry Students' Self-Efficacy and Achievement Among Concrete and Formal Reasoners in Nigerian Colleges of Education  \h [Text] 
\c by Sani Gumel Abdullahi 
 - \a Zaria:  \b Dept. of Science Education, ABU  \c 2015 
 - \a xiv,163leaves.:  \b ill. 
<br/><br/>\a Faculty of Education 
<br/><br/>\a Includes bibliographical References 
<br/><br/><label>LC Class. No.: </label>\a QD 49.6.C77 Abd  / \b 509355