Orasri Purakam,  1938- <br/><br/>
Effects of curricular change on mathematical abilities and attitudes of secondary students in Thailand  [microform] / 
by Orasri Purakam 
 - Ann Arbor, Mich. :  University Microfilms International,  1977 
 - 1 microfilm reel :  positive ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - University of Maryland, 1977 
<br/><br/><label>ISBN: </label>Y910040278 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Curriculum change--Thailand