Wittaya Damrongkiattisak <br/><br/>
Communication effectiveness between commune extension agents and rice farmers in Chiang Mai  [microform] / 
Wittaya Damrongkiattisak 
 - Ann Arbor, Mich. :  University Microfilms International,  1985 
 - 2 microfiches ;  11 x 15 cm. 
<br/><br/>Thesis (Ph.D.)-The Pennsylvania State University, 1984 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication in agriculture--Thailand