Knowles, Frank . <br/><br/>
A Practical Course in Agricultural Chemistry /  Textual Documents 
Frank Knowles. 
 - 1st ed. / 
 - New York :  Macmillan and co ,  1936. 
 - 216p. :  ill ;  22cm . 
<br/><br/><label>Subjects--Index Terms: </label>Agricultural Chemistry Chemistry-Agriculture G-Technology 
<br/><br/><label>Dewey Class. No.: </label>630.24  / K 762 P