Overholser,E.L. <br/><br/>
A study of the darkening of apple tissue ։  June,1923 Technical paper No. 7 / 
E.L.Overholser; University of california publications  
 - California :  Univ.of California press,  1923. 
 - 40 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Apple growing