Williams, R. Dorrington. <br/><br/>
Minor elements and their effects on the growth and chemical composition of herbage plants / 
by R. Dorrington Williams. 
 - 2nd ed. 
 - Farnham Royal :  Commonwealth Agricultural Bureaux,  1963. 
 - iv, 89 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Grasses--Nutrition.<br/>Grasses--Growth.<br/>Plants, Effect of trace elements on.