Valapa Piroonraksa Sangviriyakul, 1946- <br/><br/>
A comparative study of selected elementary school mathematics textbooks used in the United States and in Thailand  [microform] / 
by Valapa Piroonraksa Sangviriyakul 
 - Ann Arbor, Mich. :  University Microfilms International,  1978 
 - 1 microfilms reel :  positive ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - University of Northern Colorado, 1978 
<br/><br/><label>ISBN: </label>Y910040287 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary)--United States<br/>Mathematics--Study and teaching (Elementary)--Thailand