Songsak Sriboonchitta. <br/><br/>
The private cost of using tractors versus buffaloes:  a case study of farmer in Cha Choeng Sao province/ 
by Songkak Sriboonchitta. 
 - Thammasat University, Bangkok:  Faculty of Economics,  1975. 
 - 142 p.;  28 cm. 
<br/><br/>Moaster thesis,Thammasat University, 1975. 
<br/><br/>p. 140 - p. 142. 
<br/><br/><label>ISBN: </label>X920046460 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plows--Economic aspects.<br/>Tractors--Economic aspects.<br/>Buffaloes--Economic aspects.