Crooker, Richard Allen  <br/><br/>
Opium production in North Thailand:  a geographical perspective / 
Richard Allen Crooker. 
 - Riverside, Calif.:  University of California,  1986. 
 - 387pages ;  21cm. 
<br/><br/>Thesis (Ph.D)- University of California, Riverside, 1986. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Opium.