Knowles, Frank <br/><br/>
A practical course in agricultural chemistry for senior students of agriculture dairying, Horticulture and Poultry Husbandry/ 
Frank Knowles and J. Elphin Watkin: with foreword by Sir John Russell 
 - London:  Macmillan,  1960 
 - xi, 216 p.;  ill.:  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural chemistry<br/>Soil chemistry
<br/><br/><label>Dewey Class. No.: </label>630.24