Trevaskis, G. A. <br/><br/>
An evaluation of the extension manual of the Department of Agriculture, Stock and Fisheries / 
prepared Dr. G.A. Trevaskis. 
 - [Waigani, Port Moresby] :  Educational Materials Centre, U.P.N.G.,  1969. 
 - 48 leaves, 
 - Research report ; 2 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural extension work--Papua New Guinea.