The impact of informal groups on organisational perfomance in public secondary schools in Ilala municipality 

 - Dar es Salaam  University of Dar es Salaam  2020 
 - xi,85p.  30cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School management and organization
<br/><br/><label>LC Class. No.: </label>THS East Africana Collection LB2844.I.S6.T34L888  / Lutumbo, Abasi