Percival, G. P <br/><br/>
A mount and variability of spray residue on New Hampshire baldwins  / 
by G. P. Percival and G. F. Portter 
 - Durham, N. H.  :   Experiment Station 
 - 11 p. 
 - New Hamsphire Exp. Sta. Tech. Bull.; 49 .
<br/><br/><label>LCCN: </label>202752 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Resíduos químicos