A study on the impact of performance appraisal system in the public sector 
Ratnayaka, J.W. 
 -  2006. 
 - vii,62p.: 
<br/><br/> Wijekoon, W.M.M.G.D., & Medagama, S. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/38