Sim, D. <br/><br/>
Forestry extension methods / 
by D. Sim and H A. Hilmi. 
 - Rome :  FAO of the United Nations,  1987. 
 - ix, 155 p. :  ill. 
 - FAO forestry paper ;  no. 80 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture extension work.<br/>Forestry extension